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DevToysstring.is
Free

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

 Free

Free to use and open source under the AGPL-3.0 licence.

Windows, macOS, Linux Web, Self-hosted
  • Includes text conversion, formatters, encoders and validation tools.
  • Detects the input format and suggests output options
  • Sets no cookies and uses a strict Content Security Policy
  • Its small utilities do not replace a full development environment.
  • Internet Explorer is not supported
  • Limited to the formats its converters cover
Downloadable app Web application, Self-hosted
Open source Open source
License: MIT License: AGPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 2, 2026

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