File Signature Lookup - Free Online Tool | KeySec
Look up file type magic bytes (hex signatures) or identify file type from hex input
Use KeySec's free online File Signature Lookup tool. All processing happens 100% client-side in your browser — no data is ever sent to any server. Your inputs and outputs remain completely private and secure.
How to Use File Signature Lookup
- Enter your data in the input field
- The result appears instantly in the output panel
- Click Copy to copy the result to your clipboard
- Use the Download button to save results as a file
Features
- 100% client-side processing — your data never leaves your browser
- Real-time output as you type
- Copy results to clipboard with one click
- Download output as a file
- Share results via URL
- No sign-up required — completely free
Related Keywords
- magic
- bytes
- signature
- hex
- header
- file
- type
- identify
- png
- jpeg
- pdf
- zip