Base64 File Encoder / Decoder
100% Client-Side. Files never upload to any remote server.
About File Type Detector
The Binary File Type & Magic Number Inspector identifies true underlying file formats by analyzing binary magic bytes, MIME types, file headers, and container structures, detecting disguised, corrupted, or extension-less files.
How to Use File Type Detector
Step 1
Upload any file or drag-and-drop into the inspector.
Step 2
Inspect the identified file type, MIME type, and matching magic number bytes.
Step 3
Review the hex dump of the binary file header.
Step 4
Click "Copy Diagnosis".
Practical Use Cases for File Type Detector
Identifying Extension-Less or Mislabeled Files
Determine the real file format of mystery files missing extensions or files disguised with misleading extensions (e.g. `.exe` renamed to `.jpg`).
Malware & File Upload Security Auditing
Verify true binary file signatures before allowing user-uploaded files to enter processing pipelines.
Input & Output Examples
Detecting Disguised File Format
Uploaded mystery_file.dat
Identified Format: ZIP Archive (PKZip) | Magic Bytes: `50 4B 03 04` | MIME: application/zip | Recommended Extension: `.zip`
Key Features & Performance
- ✓Database of 500+ binary magic number signatures (Images, Documents, Audio, Video, Archives, Executables).
- ✓Displays raw hexadecimal and ASCII header dump of the first 64 bytes.
- ✓Identifies container formats: PKZip (DOCX, XLSX, JAR, APK, ODT) vs RIFF (WAV, WebP, AVI).
- ✓100% Client-Side memory inspection.
- ✓1-Click Copy file diagnosis report.
Key Terminology & Definitions
Magic Bytes (File Signature)
A specific sequence of constant bytes located at the very beginning of a file used by operating systems to identify file format unambiguously.
Hexadecimal Byte Dump
A visual representation of raw binary bytes displayed as base-16 hex numbers alongside their ASCII character equivalents.