{"id":9331,"date":"2026-03-01T20:39:07","date_gmt":"2026-03-02T01:39:07","guid":{"rendered":"https:\/\/www.ezcalculatoronline.com\/?page_id=9331"},"modified":"2026-05-09T22:34:20","modified_gmt":"2026-05-10T03:34:20","slug":"file-type-detector","status":"publish","type":"page","link":"https:\/\/www.ezcalculatoronline.com\/online-tools\/file-type-detector\/","title":{"rendered":"File Type Detector"},"content":{"rendered":"<div id=\"tdi_1\" class=\"tdc-zone\"><div class=\"tdc_zone tdi_2  wpb_row td-pb-row\"  >\n<style scoped>\n\n\/* custom css *\/\n.tdi_2{\r\n                    min-height: 0;\r\n                }\n<\/style><div id=\"tdi_3\" class=\"tdc-row\"><div class=\"vc_row tdi_4  wpb_row td-pb-row\" >\n<style scoped>\n\n\/* custom css *\/\n.tdi_4,\r\n                .tdi_4 .tdc-columns{\r\n                    min-height: 0;\r\n                }.tdi_4,\r\n\t\t\t\t.tdi_4 .tdc-columns{\r\n\t\t\t\t    display: block;\r\n\t\t\t\t}.tdi_4 .tdc-columns{\r\n\t\t\t\t    width: 100%;\r\n\t\t\t\t}\n<\/style><div class=\"vc_column tdi_6  wpb_column vc_column_container tdc-column td-pb-span8\">\n<style scoped>\n\n\/* custom css *\/\n.tdi_6{\r\n                    vertical-align: baseline;\r\n                }.tdi_6 > .wpb_wrapper,\r\n\t\t\t\t.tdi_6 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    display: block;\r\n\t\t\t\t}.tdi_6 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    width: 100%;\r\n\t\t\t\t}.tdi_6 > .wpb_wrapper > .vc_row_inner{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t}.tdi_6 > .wpb_wrapper{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t    height: auto;\r\n\t\t\t\t}\n<\/style><div class=\"wpb_wrapper\" ><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_8 \"><div class=\"td-fix-index\"><!-- Begin File Type Detector - Detects fake file extensions -->\n<div style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, sans-serif; max-width: 800px; margin: 30px auto; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); border-radius: 20px; padding: 25px; box-shadow: 0 20px 40px rgba(0,0,0,0.1);\">\n    <div style=\"background: white; border-radius: 15px; padding: 30px;\">\n        \n        <!-- Title -->\n        <h2 style=\"color: #2d3748; font-size: 28px; margin: 0 0 10px 0; text-align: center; font-weight: 600;\">\ud83d\udd2c File Type Detector<\/h2>\n        <p style=\"color: #718096; text-align: center; margin-bottom: 30px; font-size: 16px;\">Detects real file format by reading magic bytes - catches fake extensions!<\/p>\n\n        <!-- Upload Area -->\n        <div style=\"border: 2px dashed #cbd5e0; border-radius: 12px; padding: 35px; text-align: center; background: #f7fafc; transition: all 0.3s; cursor: pointer;\" \n             class=\"drop-zone\" \n             id=\"dropZone\">\n            \n            <span style=\"font-size: 28px; display: block; margin-bottom: 10px;\" id=\"uploadIcon\">\ud83d\udd0d<\/span>\n            <p style=\"color: #4a5568; font-size: 18px; font-weight: 500; margin: 10px 0;\">Drag & Drop your file here<\/p>\n            <p style=\"color: #a0aec0; margin: 5px 0;\">or<\/p>\n            <label for=\"fileInput\" style=\"display: inline-block; background: #667eea; color: white; padding: 12px 30px; border-radius: 50px; font-size: 16px; font-weight: 500; cursor: pointer; transition: background 0.3s; border: none; margin-top: 10px;\">Browse File<\/label>\n            <input type=\"file\" id=\"fileInput\" style=\"display: none;\" accept=\"*\/*\">\n        <\/div>\n\n        <!-- Selected File Info -->\n        <div id=\"selectedFileInfo\" style=\"margin-top: 15px; padding: 10px; background: #ebf8ff; border-radius: 8px; display: none;\">\n            <p style=\"color: #2c5282; margin: 0; font-size: 14px;\">\n                <span style=\"font-weight: 500;\">\ud83d\udcc1 Selected file:<\/span> \n                <span id=\"selectedFileName\"><\/span>\n                <span style=\"margin-left: 10px; color: #718096;\">(<span id=\"selectedFileSize\"><\/span>)<\/span>\n            <\/p>\n        <\/div>\n\n        <!-- Analyze Button -->\n        <div style=\"text-align: center; margin-top: 20px;\">\n            <button id=\"analyzeButton\" style=\"background: #48bb78; color: white; padding: 12px 40px; border-radius: 50px; font-size: 16px; font-weight: 600; cursor: pointer; border: none; transition: background 0.3s; box-shadow: 0 4px 6px rgba(0,0,0,0.1); display: inline-flex; align-items: center; gap: 8px;\" disabled>\n                <span>\ud83d\udd2c Analyze File<\/span>\n            <\/button>\n            <p style=\"color: #a0aec0; font-size: 12px; margin-top: 8px;\">Select a file first, then click Analyze to check<\/p>\n        <\/div>\n\n        <!-- Results Section -->\n        <div id=\"resultSection\" style=\"margin-top: 30px; display: none;\">\n            <h3 style=\"color: #2d3748; font-size: 20px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">\ud83d\udd0e Analysis Results<\/h3>\n            \n            <div style=\"background: #f8fafc; border-radius: 12px; padding: 20px;\">\n                <!-- File Info -->\n                <div style=\"display: grid; grid-template-columns: 1fr 2fr; gap: 10px; margin-bottom: 20px;\">\n                    <span style=\"color: #718096; font-weight: 500;\">File Name:<\/span>\n                    <span style=\"color: #2d3748; font-weight: 600;\" id=\"fileName\">-<\/span>\n                    \n                    <span style=\"color: #718096; font-weight: 500;\">File Size:<\/span>\n                    <span style=\"color: #2d3748; font-weight: 600;\" id=\"fileSize\">-<\/span>\n                    \n                    <span style=\"color: #718096; font-weight: 500;\">Claimed Extension:<\/span>\n                    <span style=\"color: #2d3748; font-weight: 600;\" id=\"claimedExt\">-<\/span>\n                <\/div>\n                \n                <!-- Magic Bytes \/ Header -->\n                <div style=\"background: #1a202c; border-radius: 8px; padding: 15px; margin-bottom: 20px;\">\n                    <p style=\"color: #a0aec0; margin: 0 0 10px 0; font-weight: 500;\">\ud83d\udd22 File Header (Magic Bytes - Hexadecimal)<\/p>\n                    <div style=\"background: #2d3748; padding: 12px; border-radius: 6px; overflow-x: auto;\">\n                        <code style=\"color: #68d391; font-family: monospace; font-size: 14px;\" id=\"magicBytes\">-<\/code>\n                    <\/div>\n                    <p style=\"color: #a0aec0; font-size: 12px; margin-top: 8px;\">First 16 bytes in hex - unique file signature<\/p>\n                <\/div>\n                \n                <!-- Detection Results -->\n                <div style=\"background: #edf2f7; border-radius: 8px; padding: 15px;\">\n                    <p style=\"color: #4a5568; margin: 0 0 15px 0; font-weight: 500;\">\u26a1 Detection Results<\/p>\n                    \n                    <!-- Actual Format -->\n                    <div style=\"background: white; border-radius: 6px; padding: 12px; margin-bottom: 10px;\">\n                        <div style=\"display: flex; align-items: center; gap: 10px;\">\n                            <span style=\"font-size: 24px;\" id=\"actualIcon\">\ud83d\udcc4<\/span>\n                            <div style=\"flex: 1;\">\n                                <p style=\"color: #718096; margin: 0; font-size: 12px;\">ACTUAL FILE FORMAT<\/p>\n                                <p style=\"color: #2d3748; font-weight: 700; font-size: 18px; margin: 0;\" id=\"actualFormat\">-<\/p>\n                            <\/div>\n                        <\/div>\n                        <p style=\"color: #718096; font-size: 14px; margin: 10px 0 0 0; background: #f7fafc; padding: 8px; border-radius: 4px;\" id=\"actualMime\">-<\/p>\n                    <\/div>\n                    \n                    <!-- MIME Type Info -->\n                    <div style=\"display: grid; grid-template-columns: 1fr 2fr; gap: 8px; margin: 15px 0; padding: 10px; background: white; border-radius: 6px;\">\n                        <span style=\"color: #718096;\">Browser MIME:<\/span>\n                        <span style=\"color: #2d3748; font-family: monospace;\" id=\"browserMime\">-<\/span>\n                        \n                        <span style=\"color: #718096;\">Detected MIME:<\/span>\n                        <span style=\"color: #2d3748; font-family: monospace; font-weight: 600;\" id=\"detectedMime\">-<\/span>\n                    <\/div>\n                    \n                    <!-- Warning if fake -->\n                    <div id=\"fakeWarning\" style=\"background: #FEF3C7; border-left: 4px solid #F59E0B; padding: 12px; border-radius: 4px; display: none;\">\n                        <p style=\"color: #92400E; margin: 0; font-weight: 500;\">\u26a0\ufe0f Warning: File extension doesn't match actual format!<\/p>\n                        <p style=\"color: #B45309; margin: 5px 0 0 0; font-size: 14px;\" id=\"fakeDetails\"><\/p>\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n\n        <!-- Loading -->\n        <div id=\"loadingIndicator\" style=\"text-align: center; margin-top: 20px; display: none;\">\n            <span style=\"color: #667eea;\">\ud83d\udd2c Analyzing file header...<\/span>\n        <\/div>\n\n        <!-- Error -->\n        <div id=\"errorMessage\" style=\"margin-top: 20px; background: #fed7d7; color: #c53030; padding: 12px; border-radius: 8px; display: none; text-align: center;\"><\/div>\n    <\/div>\n<\/div>\n\n<script>\n(function() {\n    'use strict';\n    \n    \/\/ Database of file signatures (magic bytes)\n    const FILE_SIGNATURES = [\n        \/\/ Images\n        { name: 'JPEG', extension: 'jpg', mime: 'image\/jpeg', signature: ['FF D8 FF'], offset: 0 },\n        { name: 'PNG', extension: 'png', mime: 'image\/png', signature: ['89 50 4E 47 0D 0A 1A 0A'], offset: 0 },\n        { name: 'GIF', extension: 'gif', mime: 'image\/gif', signature: ['47 49 46 38 37 61', '47 49 46 38 39 61'], offset: 0 },\n        { name: 'WEBP', extension: 'webp', mime: 'image\/webp', signature: ['52 49 46 46 ?? ?? ?? ?? 57 45 42 50'], offset: 0 },\n        { name: 'BMP', extension: 'bmp', mime: 'image\/bmp', signature: ['42 4D'], offset: 0 },\n        { name: 'ICO', extension: 'ico', mime: 'image\/x-icon', signature: ['00 00 01 00'], offset: 0 },\n        { name: 'TIFF', extension: 'tiff', mime: 'image\/tiff', signature: ['49 49 2A 00', '4D 4D 00 2A'], offset: 0 },\n        \n        \/\/ Documents\n        { name: 'PDF', extension: 'pdf', mime: 'application\/pdf', signature: ['25 50 44 46'], offset: 0 },\n        { name: 'DOC', extension: 'doc', mime: 'application\/msword', signature: ['D0 CF 11 E0 A1 B1 1A E1'], offset: 0 },\n        { name: 'DOCX', extension: 'docx', mime: 'application\/vnd.openxmlformats-officedocument.wordprocessingml.document', signature: ['50 4B 03 04'], offset: 0 },\n        { name: 'XLS', extension: 'xls', mime: 'application\/vnd.ms-excel', signature: ['D0 CF 11 E0 A1 B1 1A E1'], offset: 0 },\n        { name: 'XLSX', extension: 'xlsx', mime: 'application\/vnd.openxmlformats-officedocument.spreadsheetml.sheet', signature: ['50 4B 03 04'], offset: 0 },\n        { name: 'PPT', extension: 'ppt', mime: 'application\/vnd.ms-powerpoint', signature: ['D0 CF 11 E0 A1 B1 1A E1'], offset: 0 },\n        { name: 'PPTX', extension: 'pptx', mime: 'application\/vnd.openxmlformats-officedocument.presentationml.presentation', signature: ['50 4B 03 04'], offset: 0 },\n        \n        \/\/ Archives\n        { name: 'ZIP', extension: 'zip', mime: 'application\/zip', signature: ['50 4B 03 04', '50 4B 05 06', '50 4B 07 08'], offset: 0 },\n        { name: 'RAR', extension: 'rar', mime: 'application\/x-rar-compressed', signature: ['52 61 72 21 1A 07 00', '52 61 72 21 1A 07 01'], offset: 0 },\n        { name: '7Z', extension: '7z', mime: 'application\/x-7z-compressed', signature: ['37 7A BC AF 27 1C'], offset: 0 },\n        { name: 'TAR', extension: 'tar', mime: 'application\/x-tar', signature: ['75 73 74 61 72'], offset: 257 },\n        { name: 'GZ', extension: 'gz', mime: 'application\/gzip', signature: ['1F 8B'], offset: 0 },\n        \n        \/\/ Audio\/Video\n        { name: 'MP3', extension: 'mp3', mime: 'audio\/mpeg', signature: ['49 44 33', 'FF FB', 'FF F3', 'FF F2'], offset: 0 },\n        { name: 'MP4', extension: 'mp4', mime: 'video\/mp4', signature: ['00 00 00 18 66 74 79 70', '00 00 00 20 66 74 79 70', '66 74 79 70 69 73 6F 6D'], offset: 4 },\n        { name: 'AVI', extension: 'avi', mime: 'video\/x-msvideo', signature: ['52 49 46 46 ?? ?? ?? ?? 41 56 49 20'], offset: 0 },\n        { name: 'MOV', extension: 'mov', mime: 'video\/quicktime', signature: ['00 00 00 14 66 74 79 70 71 74 20 20'], offset: 4 },\n        { name: 'FLV', extension: 'flv', mime: 'video\/x-flv', signature: ['46 4C 56 01'], offset: 0 },\n        { name: 'WAV', extension: 'wav', mime: 'audio\/wav', signature: ['52 49 46 46 ?? ?? ?? ?? 57 41 56 45'], offset: 0 },\n        \n        \/\/ Executables\n        { name: 'EXE', extension: 'exe', mime: 'application\/x-msdownload', signature: ['4D 5A'], offset: 0 },\n        { name: 'ELF', extension: 'elf', mime: 'application\/x-executable', signature: ['7F 45 4C 46'], offset: 0 },\n        { name: 'Mach-O', extension: 'macho', mime: 'application\/x-mach-binary', signature: ['FE ED FA CE', 'FE ED FA CF', 'CE FA ED FE', 'CF FA ED FE'], offset: 0 },\n        \n        \/\/ Web\n        { name: 'HTML', extension: 'html', mime: 'text\/html', signature: ['3C 21 44 4F 43 54 59 50 45', '3C 68 74 6D 6C', '3C 48 54 4D 4C'], offset: 0 },\n        { name: 'XML', extension: 'xml', mime: 'application\/xml', signature: ['3C 3F 78 6D 6C'], offset: 0 },\n        { name: 'CSS', extension: 'css', mime: 'text\/css', signature: ['2F 2A', '40 6D 65 64 69 61'], offset: 0 },\n        { name: 'JS', extension: 'js', mime: 'application\/javascript', signature: ['2F 2F', '2F 2A'], offset: 0 },\n        \n        \/\/ Fonts\n        { name: 'TTF', extension: 'ttf', mime: 'font\/ttf', signature: ['00 01 00 00 00'], offset: 0 },\n        { name: 'OTF', extension: 'otf', mime: 'font\/otf', signature: ['4F 54 54 4F'], offset: 0 },\n        { name: 'WOFF', extension: 'woff', mime: 'font\/woff', signature: ['77 4F 46 46'], offset: 0 },\n        { name: 'WOFF2', extension: 'woff2', mime: 'font\/woff2', signature: ['77 4F 46 32'], offset: 0 }\n    ];\n\n    \/\/ Current file variable\n    let currentFile = null;\n\n    function initDetector() {\n        const dropZone = document.getElementById('dropZone');\n        const fileInput = document.getElementById('fileInput');\n        const analyzeButton = document.getElementById('analyzeButton');\n        \n        if (!dropZone || !fileInput || !analyzeButton) return;\n        \n        \/\/ Setup events\n        dropZone.addEventListener('click', () => fileInput.click());\n        \n        dropZone.addEventListener('dragover', (e) => {\n            e.preventDefault();\n            dropZone.style.background = '#e2e8f0';\n            dropZone.style.borderColor = '#667eea';\n        });\n        \n        dropZone.addEventListener('dragleave', () => {\n            dropZone.style.background = '#f7fafc';\n            dropZone.style.borderColor = '#cbd5e0';\n        });\n        \n        dropZone.addEventListener('drop', (e) => {\n            e.preventDefault();\n            dropZone.style.background = '#f7fafc';\n            dropZone.style.borderColor = '#cbd5e0';\n            \n            if (e.dataTransfer.files.length > 0) {\n                handleFileSelected(e.dataTransfer.files[0]);\n            }\n        });\n        \n        fileInput.addEventListener('change', (e) => {\n            if (e.target.files.length > 0) {\n                handleFileSelected(e.target.files[0]);\n            }\n        });\n\n        \/\/ Handle Analyze button\n        analyzeButton.addEventListener('click', () => {\n            if (currentFile) {\n                processFile(currentFile);\n            }\n        });\n        \n        \/\/ Prevent default drag\/drop on page\n        document.addEventListener('dragover', (e) => e.preventDefault());\n        document.addEventListener('drop', (e) => e.preventDefault());\n    }\n\n    function handleFileSelected(file) {\n        currentFile = file;\n        \n        \/\/ Display selected file info\n        const selectedFileInfo = document.getElementById('selectedFileInfo');\n        const selectedFileName = document.getElementById('selectedFileName');\n        const selectedFileSize = document.getElementById('selectedFileSize');\n        const analyzeButton = document.getElementById('analyzeButton');\n        \n        selectedFileName.textContent = file.name;\n        selectedFileSize.textContent = formatFileSize(file.size);\n        selectedFileInfo.style.display = 'block';\n        \n        \/\/ Enable Analyze button\n        analyzeButton.disabled = false;\n        analyzeButton.style.background = '#48bb78';\n        analyzeButton.style.cursor = 'pointer';\n        \n        \/\/ Hide previous results\n        document.getElementById('resultSection').style.display = 'none';\n        hideError();\n    }\n    \n    async function processFile(file) {\n        showLoading(true);\n        hideError();\n        \n        try {\n            \/\/ Read file header (first 512 bytes)\n            const header = await readFileHeader(file, 512);\n            const magicBytes = bytesToHex(header);\n            \n            \/\/ Detect actual format\n            const detectedFormat = detectFileFormat(header);\n            \n            \/\/ Get claimed extension\n            const claimedExt = file.name.split('.').pop() || 'none';\n            \n            \/\/ Display results\n            displayResults(file, claimedExt, magicBytes, detectedFormat);\n            \n        } catch (error) {\n            showError('Error reading file: ' + error.message);\n        } finally {\n            showLoading(false);\n        }\n    }\n    \n    function readFileHeader(file, bytes) {\n        return new Promise((resolve, reject) => {\n            const reader = new FileReader();\n            \n            reader.onload = (e) => {\n                const arrayBuffer = e.target.result;\n                const header = new Uint8Array(arrayBuffer.slice(0, bytes));\n                resolve(header);\n            };\n            \n            reader.onerror = () => reject(new Error('Failed to read file'));\n            reader.readAsArrayBuffer(file);\n        });\n    }\n    \n    function bytesToHex(bytes) {\n        const hex = Array.from(bytes.slice(0, 16))\n            .map(b => b.toString(16).padStart(2, '0').toUpperCase())\n            .join(' ');\n        \n        \/\/ Add ellipsis if file is larger\n        return bytes.length > 16 ? hex + ' ...' : hex;\n    }\n    \n    function detectFileFormat(header) {\n        const headerArray = Array.from(header);\n        \n        for (const format of FILE_SIGNATURES) {\n            for (const sig of format.signature) {\n                const sigBytes = sig.split(' ').map(hex => hex === '??' ? null : parseInt(hex, 16));\n                let match = true;\n                \n                for (let i = 0; i < sigBytes.length; i++) {\n                    const pos = format.offset + i;\n                    if (sigBytes[i] !== null && headerArray[pos] !== sigBytes[i]) {\n                        match = false;\n                        break;\n                    }\n                }\n                \n                if (match) {\n                    return format;\n                }\n            }\n        }\n        \n        \/\/ Check for text files\n        try {\n            const textSample = new TextDecoder().decode(header.slice(0, 256));\n            if (\/^[\\x20-\\x7E\\r\\n\\t]+$\/.test(textSample)) {\n                if (textSample.includes('<?xml')) return { name: 'XML', extension: 'xml', mime: 'application\/xml' };\n                if (textSample.includes('<!DOCTYPE html>') || textSample.includes('<html')) return { name: 'HTML', extension: 'html', mime: 'text\/html' };\n                if (textSample.includes('@media') || textSample.includes('{')) return { name: 'CSS', extension: 'css', mime: 'text\/css' };\n                if (textSample.includes('function') || textSample.includes('var ') || textSample.includes('let ')) return { name: 'JavaScript', extension: 'js', mime: 'application\/javascript' };\n                return { name: 'Text', extension: 'txt', mime: 'text\/plain' };\n            }\n        } catch (e) {\n            \/\/ Ignore text detection errors\n        }\n        \n        return { name: 'Unknown', extension: 'bin', mime: 'application\/octet-stream' };\n    }\n    \n    function displayResults(file, claimedExt, magicBytes, detectedFormat) {\n        document.getElementById('resultSection').style.display = 'block';\n        \n        \/\/ Basic info\n        document.getElementById('fileName').textContent = file.name;\n        document.getElementById('fileSize').textContent = formatFileSize(file.size);\n        document.getElementById('claimedExt').textContent = claimedExt;\n        document.getElementById('magicBytes').textContent = magicBytes;\n        \n        \/\/ Browser MIME\n        document.getElementById('browserMime').textContent = file.type || 'Not provided';\n        \n        \/\/ Detected format\n        document.getElementById('actualFormat').textContent = `${detectedFormat.name} (.${detectedFormat.extension})`;\n        document.getElementById('actualMime').textContent = detectedFormat.mime;\n        document.getElementById('detectedMime').textContent = detectedFormat.mime;\n        \n        \/\/ Icon\n        document.getElementById('actualIcon').textContent = getFileIcon(detectedFormat.name);\n        \n        \/\/ Check for fake extension\n        const fakeWarning = document.getElementById('fakeWarning');\n        const fakeDetails = document.getElementById('fakeDetails');\n        \n        if (detectedFormat.extension !== claimedExt.toLowerCase() && detectedFormat.extension !== 'bin') {\n            fakeWarning.style.display = 'block';\n            fakeDetails.textContent = `File claims to be .${claimedExt} but is actually .${detectedFormat.extension} (${detectedFormat.name})`;\n        } else {\n            fakeWarning.style.display = 'none';\n        }\n\n        \/\/ Smooth scroll to results\n        document.getElementById('resultSection').scrollIntoView({ behavior: 'smooth', block: 'nearest' });\n    }\n    \n    function getFileIcon(format) {\n        const icons = {\n            'JPEG': '\ud83d\uddbc\ufe0f', 'PNG': '\ud83d\uddbc\ufe0f', 'GIF': '\ud83d\uddbc\ufe0f', 'WEBP': '\ud83d\uddbc\ufe0f', 'BMP': '\ud83d\uddbc\ufe0f',\n            'PDF': '\ud83d\udcd5', 'DOC': '\ud83d\udcd8', 'DOCX': '\ud83d\udcd8', 'XLS': '\ud83d\udcca', 'XLSX': '\ud83d\udcca', 'PPT': '\ud83d\udcfd\ufe0f', 'PPTX': '\ud83d\udcfd\ufe0f',\n            'ZIP': '\ud83d\udddc\ufe0f', 'RAR': '\ud83d\udddc\ufe0f', '7Z': '\ud83d\udddc\ufe0f', 'TAR': '\ud83d\udddc\ufe0f', 'GZ': '\ud83d\udddc\ufe0f',\n            'MP3': '\ud83c\udfb5', 'MP4': '\ud83c\udfac', 'AVI': '\ud83c\udfac', 'MOV': '\ud83c\udfac', 'WAV': '\ud83c\udfb5',\n            'EXE': '\u2699\ufe0f', 'HTML': '\ud83c\udf10', 'XML': '\ud83d\udccb', 'CSS': '\ud83c\udfa8', 'JavaScript': '\ud83d\udcbb',\n            'Text': '\ud83d\udcc3', 'Unknown': '\ud83d\udcc4'\n        };\n        return icons[format] || '\ud83d\udcc4';\n    }\n    \n    function formatFileSize(bytes) {\n        if (bytes === 0) return '0 Bytes';\n        const k = 1024;\n        const sizes = ['Bytes', 'KB', 'MB', 'GB'];\n        const i = Math.floor(Math.log(bytes) \/ Math.log(k));\n        return parseFloat((bytes \/ Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];\n    }\n    \n    function showLoading(show) {\n        document.getElementById('loadingIndicator').style.display = show ? 'block' : 'none';\n    }\n    \n    function showError(message) {\n        const errorEl = document.getElementById('errorMessage');\n        errorEl.textContent = message;\n        errorEl.style.display = 'block';\n    }\n    \n    function hideError() {\n        document.getElementById('errorMessage').style.display = 'none';\n    }\n    \n    \/\/ Initialize when DOM is ready\n    if (document.readyState === 'loading') {\n        document.addEventListener('DOMContentLoaded', initDetector);\n    } else {\n        initDetector();\n    }\n})();\n<\/script>\n\n<style>\n\/* Responsive *\/\n@media (max-width: 640px) {\n    div[style*=\"max-width: 800px\"] {\n        margin: 15px !important;\n        padding: 15px !important;\n    }\n    \n    #magicBytes {\n        font-size: 10px !important;\n    }\n}\n\n\/* Animation *\/\n@keyframes pulse {\n    0%, 100% { opacity: 1; }\n    50% { opacity: 0.5; }\n}\n\n#loadingIndicator span {\n    animation: pulse 1.5s ease-in-out infinite;\n}\n\n\/* Hover effects *\/\nlabel[for=\"fileInput\"]:hover {\n    background: #5a67d8 !important;\n    transform: translateY(-2px);\n    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);\n}\n\n#analyzeButton:hover:not(:disabled) {\n    background: #38a169 !important;\n    transform: translateY(-2px);\n    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);\n}\n\n#analyzeButton:disabled {\n    opacity: 0.5;\n    cursor: not-allowed !important;\n}\n<\/style>\n<!-- End File Type Detector --><\/div><\/div><div class=\"wpb_wrapper wpb_text_column td_block_wrap td_block_wrap vc_column_text tdi_9  tagdiv-type td-pb-border-top td_block_template_1\"  data-td-block-uid=\"tdi_9\" ><div class=\"td-block-title-wrap\"><\/div><div class=\"td-fix-index\"><h1 data-start=\"0\" data-end=\"66\"><strong>\ud83d\udd0d File Type Detector: How to Identify Any File Format Instantly<\/strong><\/h1>\n<p data-start=\"68\" data-end=\"238\">Have you ever downloaded a file and had no idea what it actually was? Maybe it had no extension. Maybe it wouldn\u2019t open. Or worse \u2014 maybe the extension looked suspicious.<\/p>\n<p data-start=\"240\" data-end=\"297\">That\u2019s exactly why a <strong data-start=\"261\" data-end=\"283\">File Type Detector<\/strong> is essential.<\/p>\n<p data-start=\"299\" data-end=\"491\">In this article, we\u2019ll explain what a File Type Detector is, how it works, why file extensions can\u2019t always be trusted, and how this tool protects you from errors and potential security risks.<\/p>\n<h2 data-start=\"498\" data-end=\"533\"><strong>What Is a File Type Detector?<\/strong><\/h2>\n<p data-start=\"535\" data-end=\"678\">A <strong data-start=\"537\" data-end=\"559\">File Type Detector<\/strong> is an online tool that identifies the <em data-start=\"598\" data-end=\"604\">real<\/em> format of a file by analyzing its internal structure \u2014 not just its name.<\/p>\n<p data-start=\"680\" data-end=\"732\">Most operating systems rely on file extensions like:<\/p>\n<ul data-start=\"734\" data-end=\"779\">\n<li data-start=\"734\" data-end=\"742\">\n<p data-start=\"736\" data-end=\"742\"><code data-start=\"736\" data-end=\"742\">.jpg<\/code><\/p>\n<\/li>\n<li data-start=\"743\" data-end=\"751\">\n<p data-start=\"745\" data-end=\"751\"><code data-start=\"745\" data-end=\"751\">.png<\/code><\/p>\n<\/li>\n<li data-start=\"752\" data-end=\"760\">\n<p data-start=\"754\" data-end=\"760\"><code data-start=\"754\" data-end=\"760\">.pdf<\/code><\/p>\n<\/li>\n<li data-start=\"761\" data-end=\"770\">\n<p data-start=\"763\" data-end=\"770\"><code data-start=\"763\" data-end=\"770\">.docx<\/code><\/p>\n<\/li>\n<li data-start=\"771\" data-end=\"779\">\n<p data-start=\"773\" data-end=\"779\"><code data-start=\"773\" data-end=\"779\">.mp4<\/code><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"781\" data-end=\"836\">But file extensions can easily be changed. For example:<\/p>\n<div class=\"relative w-full my-4\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute inset-x-4 top-12 bottom-4\">\n<div class=\"pointer-events-none sticky z-40 shrink-0 z-1!\">\n<div class=\"sticky bg-token-border-light\"><\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">document.pdf \u2192 document.jpg<br \/>\nvirus.exe \u2192 image.png<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"897\" data-end=\"1015\">Even if the extension changes, the internal file signature remains the same. That\u2019s what the File Type Detector reads.<\/p>\n<h2 data-start=\"1022\" data-end=\"1045\">\ud83e\udde0 How Does It Work?<\/h2>\n<p data-start=\"1047\" data-end=\"1148\">Every file contains a hidden identifier called a <strong data-start=\"1096\" data-end=\"1114\">file signature<\/strong> (also known as a <em data-start=\"1132\" data-end=\"1146\">magic number<\/em>).<\/p>\n<p data-start=\"1150\" data-end=\"1269\">A file signature is a small set of bytes at the beginning of a file that tells software what type of file it really is.<\/p>\n<p data-start=\"1271\" data-end=\"1283\">For example:<\/p>\n<ul data-start=\"1285\" data-end=\"1389\">\n<li data-start=\"1285\" data-end=\"1320\">\n<p data-start=\"1287\" data-end=\"1320\">JPEG files begin with: <code data-start=\"1310\" data-end=\"1320\">FF D8 FF<\/code><\/p>\n<\/li>\n<li data-start=\"1321\" data-end=\"1358\">\n<p data-start=\"1323\" data-end=\"1358\">PNG files begin with: <code data-start=\"1345\" data-end=\"1358\">89 50 4E 47<\/code><\/p>\n<\/li>\n<li data-start=\"1359\" data-end=\"1389\">\n<p data-start=\"1361\" data-end=\"1389\">PDF files begin with: <code data-start=\"1383\" data-end=\"1389\">%PDF<\/code><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1391\" data-end=\"1508\">A File Type Detector scans these signatures to determine the actual file type \u2014 regardless of what the file is named.<\/p>\n<p data-start=\"1510\" data-end=\"1557\">This makes the detection accurate and reliable.<\/p>\n<h2 data-start=\"1564\" data-end=\"1609\"><strong>\u26a0\ufe0f Why You Shouldn\u2019t Trust File Extensions<\/strong><\/h2>\n<p data-start=\"1611\" data-end=\"1662\">Relying only on file extensions can cause problems:<\/p>\n<h3 data-start=\"1664\" data-end=\"1688\">1\ufe0f\u20e3 Files Won\u2019t Open<\/h3>\n<p data-start=\"1689\" data-end=\"1780\">If a file has the wrong extension, your computer may try to open it with the wrong program.<\/p>\n<h3 data-start=\"1782\" data-end=\"1804\">2\ufe0f\u20e3 Security Risks<\/h3>\n<p data-start=\"1805\" data-end=\"1881\">Malicious files can disguise themselves by changing extensions. For example:<\/p>\n<div class=\"relative w-full my-4\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute inset-x-4 top-12 bottom-4\">\n<div class=\"pointer-events-none sticky z-40 shrink-0 z-1!\">\n<div class=\"sticky bg-token-border-light\"><\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">invoice.pdf.exe<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"1908\" data-end=\"1966\">It may look like a PDF but is actually an executable file.<\/p>\n<h3 data-start=\"1968\" data-end=\"2001\">3\ufe0f\u20e3 Corrupted or Broken Files<\/h3>\n<p data-start=\"2002\" data-end=\"2131\">Sometimes files lose their extensions during transfers or uploads. Without the extension, it\u2019s hard to know what software to use.<\/p>\n<p data-start=\"3264\" data-end=\"3316\">File extensions can lie \u2014 but file signatures don\u2019t.<\/p>\n<p data-start=\"3318\" data-end=\"3561\">A File Type Detector gives you clarity, security, and confidence when handling unknown files. Whether you&#8217;re troubleshooting, verifying uploads, or checking suspicious downloads, this simple tool can save you time and prevent serious mistakes.<\/p>\n<p data-start=\"3563\" data-end=\"3640\">Next time you encounter a mysterious file, don\u2019t guess \u2014 detect it instantly.<\/p>\n<\/div><\/div><\/div><\/div><div class=\"vc_column tdi_11  wpb_column vc_column_container tdc-column td-pb-span4 td-is-sticky\">\n<style scoped>\n\n\/* custom css *\/\n.tdi_11{\r\n                    vertical-align: middle;\r\n                }.tdi_11 > .wpb_wrapper,\r\n\t\t\t\t.tdi_11 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    display: block;\r\n\t\t\t\t}.tdi_11 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    width: 100%;\r\n\t\t\t\t}.tdi_11 > .wpb_wrapper > .vc_row_inner{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t}.tdi_11 > .wpb_wrapper{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t    height: auto;\r\n\t\t\t\t}\n<\/style><div class=\"wpb_wrapper\" data-sticky-offset=\"20\"><div class=\"td_block_wrap td_block_list_menu tdi_12 td-blm-display-vertical td-pb-border-top td_block_template_1 widget\"  data-td-block-uid=\"tdi_12\" >\n<style>\n\n\/* inline tdc_css att *\/\n\n.tdi_12{\npadding-top:20px !important;\n}\n\n<\/style>\n<style>\n\/* custom css *\/\n.td_block_list_menu ul{\r\n                  flex-wrap: wrap;\r\n                  margin-left: 12px;\r\n                }.td_block_list_menu ul li{\r\n\t\t\t\t\tmargin-left: 0;\r\n\t\t\t\t}.td_block_list_menu ul li a{\r\n\t\t\t\t\tdisplay: flex;\r\n                  \tmargin-left: 0;\r\n                }.td_block_list_menu .td-blm-menu-item-txt{\r\n\t\t\t\t\tdisplay: flex;\r\n\t\t\t\t\talign-items: center;\r\n\t\t\t\t\tflex-grow: 1;\r\n\t\t\t\t}.td_block_list_menu .sub-menu{\r\n                  padding-left: 22px;\r\n                }.td_block_list_menu .sub-menu li{\r\n                  font-size: 13px;\r\n                }.td_block_list_menu li.current-menu-item > a,\r\n\t\t\t\t.td_block_list_menu li.current-menu-ancestor > a,\r\n\t\t\t\t.td_block_list_menu li.current-category-ancestor > a{\r\n\t\t\t\t    color: #4db2ec;\r\n\t\t\t\t}.td_block_list_menu .td-blm-sub-icon{\r\n\t\t\t\t\tdisplay: flex;\r\n\t\t\t\t\talign-items: center;\r\n\t\t\t\t\tjustify-content: center;\r\n\t\t\t\t\tmargin-left: .6em;\r\n\t\t\t\t\tpadding: 0 .6em;\r\n\t\t\t\t\ttransition: transform .2s ease-in-out;\r\n\t\t\t\t}.td_block_list_menu .td-blm-sub-icon svg{\r\n\t\t\t\t\tdisplay: block;\r\n\t\t\t\t\twidth: 1em;\r\n\t\t\t\t\theight: auto;\r\n\t\t\t\t}.td_block_list_menu .td-blm-sub-icon svg,\r\n\t\t\t\t.td_block_list_menu .td-blm-sub-icon svg *{\r\n\t\t\t\t\tfill: currentColor;\r\n\t\t\t\t}.td_block_list_menu.td-blm-display-accordion .menu-item-has-children ul{\r\n\t\t\t\t\tdisplay: none;\r\n\t\t\t\t}.td_block_list_menu.td-blm-display-accordion .menu-item-has-children-open > a > .td-blm-sub-icon{\r\n\t\t\t\t\ttransform: rotate(180deg);\r\n\t\t\t\t}.td_block_list_menu.td-blm-display-horizontal ul{\r\n\t\t\t\t\tdisplay: flex;\r\n\t\t\t\t}body .tdi_12 ul{\r\n\t\t\t\t\ttext-align: left;\r\n\t\t\t\t\tjustify-content: flex-start;\r\n\t\t\t\t}body .tdi_12 ul li a{\r\n\t\t\t\t\tjustify-content: flex-start;\r\n\t\t\t\t}body .tdi_12 .td-blm-menu-item-txt{\r\n\t\t\t\t\tflex-grow: 1;\r\n\t\t\t\t}\n<\/style><div class=\"td-block-title-wrap\"><h4 class=\"block-title td-block-title\"><span class=\"td-pulldown-size\">Other Calculators<\/span><\/h4><\/div><div id=tdi_12 class=\"td_block_inner td-fix-index\"><div class=\"menu-other-calculators-container\"><ul id=\"menu-other-calculators\" class=\"menu\"><li id=\"menu-item-2618\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2618\"><a href=\"https:\/\/www.ezcalculatoronline.com\/construction-calculators\/board-foot-calculator\/\"><span class=\"td-blm-menu-item-txt\">Board Foot Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2619\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2619\"><a href=\"https:\/\/www.ezcalculatoronline.com\/construction-calculators\/paint-calculator\/\"><span class=\"td-blm-menu-item-txt\">Paint Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2620\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2620\"><a href=\"https:\/\/www.ezcalculatoronline.com\/math\/average-percentage-calculator\/\"><span class=\"td-blm-menu-item-txt\">Average Percentage Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2621\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2621\"><a href=\"https:\/\/www.ezcalculatoronline.com\/math\/fraction-to-percent-calculator\/\"><span class=\"td-blm-menu-item-txt\">Fraction to Percent Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2622\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2622\"><a href=\"https:\/\/www.ezcalculatoronline.com\/physics-calculators\/velocity-calculator\/\"><span class=\"td-blm-menu-item-txt\">Velocity Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2623\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2623\"><a href=\"https:\/\/www.ezcalculatoronline.com\/games\/pokemon-go-candy\/\"><span class=\"td-blm-menu-item-txt\">Pok\u00e9mon Go Candy Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2624\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2624\"><a href=\"https:\/\/www.ezcalculatoronline.com\/games\/pokemon-search\/\"><span class=\"td-blm-menu-item-txt\">Pok\u00e9mon Search<\/span><\/a><\/li>\n<li id=\"menu-item-2625\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2625\"><a href=\"https:\/\/www.ezcalculatoronline.com\/games\/lottery-numbers-tool\/\"><span class=\"td-blm-menu-item-txt\">Lottery Numbers Tool<\/span><\/a><\/li>\n<li id=\"menu-item-2626\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2626\"><a href=\"https:\/\/www.ezcalculatoronline.com\/pets-calculators\/pet-age-calculator\/\"><span class=\"td-blm-menu-item-txt\">Pet Age Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2627\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2627\"><a href=\"https:\/\/www.ezcalculatoronline.com\/pets-calculators\/dog-pregnancy-calculator\/\"><span class=\"td-blm-menu-item-txt\">Dog Pregnancy Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2628\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2628\"><a href=\"https:\/\/www.ezcalculatoronline.com\/online-tools\/website-to-ip-lookup\/\"><span class=\"td-blm-menu-item-txt\">Website to IP lookup<\/span><\/a><\/li>\n<li id=\"menu-item-2629\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2629\"><a href=\"https:\/\/www.ezcalculatoronline.com\/online-tools\/search-ip-address\/\"><span class=\"td-blm-menu-item-txt\">Search IP Address<\/span><\/a><\/li>\n<li id=\"menu-item-2630\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2630\"><a href=\"https:\/\/www.ezcalculatoronline.com\/online-tools\/wheel-of-names\/\"><span class=\"td-blm-menu-item-txt\">Wheel of Names<\/span><\/a><\/li>\n<li id=\"menu-item-2631\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2631\"><a href=\"https:\/\/www.ezcalculatoronline.com\/education-calculators\/test-grade-calculator\/\"><span class=\"td-blm-menu-item-txt\">Test Grade Calculator<\/span><\/a><\/li>\n<li id=\"menu-item-2632\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2632\"><a href=\"https:\/\/www.ezcalculatoronline.com\/online-tools\/hex-color-picker\/\"><span class=\"td-blm-menu-item-txt\">Color Picker<\/span><\/a><\/li>\n<\/ul><\/div><\/div><\/div><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_14 \"><div class=\"td-fix-index\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-7396755811986582\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- ads 300 x 250 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-7396755811986582\"\n     data-ad-slot=\"2517371721\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_16 \"><div class=\"td-fix-index\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-7396755811986582\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- Ads KNS 300 x 600 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:600px\"\n     data-ad-client=\"ca-pub-7396755811986582\"\n     data-ad-slot=\"4956265638\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":9354,"parent":4298,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-9331","page","type-page","status-publish","has-post-thumbnail"],"rankMath":{"parentDomain":"ezcalculatoronline.com","noFollowDomains":[],"noFollowExcludeDomains":[],"noFollowExternalLinks":false,"featuredImageNotice":"The featured image should be at least 200 by 200 pixels to be picked up by Facebook and other social media sites.","pluginReviewed":false,"postSettings":{"linkSuggestions":true,"useFocusKeyword":false},"frontEndScore":false,"postName":"file-type-detector","permalinkFormat":"https:\/\/www.ezcalculatoronline.com\/%pagename%\/","showLockModifiedDate":true,"assessor":{"focusKeywordLink":"https:\/\/www.ezcalculatoronline.com\/wp-admin\/edit.php?focus_keyword=%focus_keyword%&post_type=%post_type%","hasTOCPlugin":false,"primaryTaxonomy":false,"serpData":{"title":"Free File Type Detector | Check Real File Format","description":"Upload any file and instantly discover its true format. 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