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WasyTech
AvailableOpen SourceMIT

File Signature Analyzer

Detect spoofed files via magic bytes.

Malicious files often hide behind fake extensions. File Signature Analyzer reads the raw binary headers (magic bytes) of your files directly in the browser to determine their true format. Because it only slices the first few kilobytes locally, it processes massive files instantly without ever uploading your sensitive data to a server.

  • Web
Open SourceLocal processingNo account

Downloads for this utility are being prepared.

Core features

Included in the free core utility.

  • Instant magic byte detection via local ArrayBuffers
  • Detects extension spoofing and disguised executables
  • Zero-upload architecture ensures absolute privacy
  • Handles multi-gigabyte files instantly via Blob slicing

Privacy & data handling

This utility processes data locally on your device wherever technically possible.

Processing
Local, on your device
Account
Not required
Internet
Works offline
Telemetry
No telemetry

Details

Category
Developer Tools
Platforms
Web
License
MIT

Frequently asked questions

What does File Signature do?

Malicious files often hide behind fake extensions. File Signature Analyzer reads the raw binary headers (magic bytes) of your files directly in the browser to determine their true format. Because it only slices the first few kilobytes locally, it processes massive files instantly without ever uploading your sensitive data to a server.

Is File Signature free?

Yes. File Signature is free to use.

Is File Signature open source?

Yes. File Signature is open source under the MIT license.

Does File Signature require an account?

No. File Signature does not require an account.

Does File Signature send my data anywhere?

File Signature has no telemetry. Processing happens locally on your device.

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