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DevToysJSON Formatter
Free

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

 Free

Free and open source.

Windows, macOS, Linux Browser extension
  • Includes text conversion, formatters, encoders and validation tools.
  • Collapsible trees with indent guides and syntax highlighting
  • Toggle between raw and parsed JSON
  • Its small utilities do not replace a full development environment.
  • Built as a Chrome extension; other browsers are not mentioned
  • Viewing only, not a JSON editor
Downloadable app Browser extension
Open source Open source
License: MIT License not stated
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 September 24, 2026

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