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WhatWebhttpx
Free

Free and open source under GPLv2.

 Free

The open-source software is available without a license fee. Hosting, hardware and…

Windows, macOS, Linux, Command line Windows, macOS, Linux, Command line
  • Fingerprints hundreds of web technologies via plugins
  • Adjustable aggression levels
  • Collects response information from lists of hosts or URLs.
  • Command-line only
  • Intended only for authorized testing
  • This is the Go probing tool, not the Python library with the same name.
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: MIT
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 24, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.