File mime type checker
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📁 File MIME Type Checker – Detect the Real Type of Any File
Check file extensions, content type, and ensure secure validation
Use our free File MIME Type Checker to analyze and validate the actual MIME type of any file. This tool helps developers, system admins, and security teams to identify mismatches between file extensions and real file formats – essential for secure file uploads, malware prevention, and web development.
Simply upload a file, and we'll show its real content type, extension, and media type (MIME) – based on binary signature, not just the file name.
🔍 What Does the MIME Type Checker Analyze?
- 📄 File name and extension (e.g. .jpg, .exe, .pdf)
- 📦 MIME type based on file content (e.g. image/jpeg, application/pdf)
- ⚠️ Extension vs content mismatch detection
- 🧩 Binary file signature (magic number)
- 🔐 Upload safety checks for common vulnerabilities
🛡️ Why File MIME Type Validation Matters
- ✅ Prevent security risks like disguised executables
- ✅ Avoid file type spoofing in web forms & APIs
- ✅ Enforce safe upload policies in CMS & apps
- ✅ Ensure correct handling by web servers & browsers
- ✅ Maintain data integrity in file storage systems
📈 Sample Result Overview
| Attribute | Example Output |
|---|---|
| File Name | document.pdf |
| Extension | |
| Detected MIME Type | application/pdf |
| Content-Type Match | Yes ✅ |
| Binary Signature | 25 50 44 46 (PDF) |
🌍 Supported File Types
Our MIME checker works with a wide range of file types:
- 📷 Images (.jpg, .png, .gif, .svg)
- 📄 Documents (.pdf, .docx, .xlsx, .txt)
- 🎵 Audio (.mp3, .wav, .ogg)
- 🎞️ Video (.mp4, .avi, .mov)
- 📦 Archives (.zip, .rar, .7z, .tar.gz)
- 💻 Executables (.exe, .sh, .bat)
- 💡 And many more
🔒 100% Privacy-Focused
Your uploaded file is not stored and is processed only in-memory for analysis. We respect your privacy – always.
🚀 How to Use the MIME Type Checker
- Click "Choose File" and upload any document
- Wait a few seconds for analysis
- Review the MIME type, extension, and any mismatches
💡 Pro Tip: Combine with Other File & Domain Tools
Pair this checker with our Safe URL Checker, HTTP Headers Tool, or SSL Certificate Checker to audit complete web uploads and hosting environments.
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