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halptldr pages
Free

Free and open source under Apache-2.0 or MIT.

 Free

The open-source project is available without a license fee.

Command line Windows, macOS, Linux, Web, Command line
  • Checks several common help and version argument forms
  • Allows custom arguments and configuration
  • Answers the common use of a command in seconds instead of reading a manual page
  • Clients for terminal, browser and editors, with offline caching
  • Cheat sheet lookup uses an online service
  • Deliberately incomplete; the real manual page is still needed for edge cases
  • Page quality varies with community contributions
Downloadable app Downloadable app, Web application
Open source Open source
License: Apache-2.0 OR MIT License: MIT
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 8, 2026

Checked September 22, 2026

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