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OmniToolsstring.is
Free

Free to use, self-hostable.

 Free

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

Web, Self-hosted Web, Self-hosted
  • Wide range of utilities covering images, text, PDFs and data in one place
  • Can be self-hosted instead of relying on the public instance
  • Detects the input format and suggests output options
  • Sets no cookies and uses a strict Content Security Policy
  • Broad scope means individual tools may be less refined than dedicated single-purpose apps
  • Self-hosting requires setting up and maintaining your own instance
  • Internet Explorer is not supported
  • Limited to the formats its converters cover
Web application, Self-hosted Web application, Self-hosted
Closed source Open source
License not stated 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.