About OpenToolbox

OpenToolbox is a curated collection of free online tools. Every tool is built on a well-maintained open-source project, and wherever possible it runs entirely in your browser, so your files and data stay on your device.

Our principles

• Free to use, no sign-up.
• Local processing first. If a tool ever needs a server, the tool page says so clearly.
• Credit to the open-source projects that make these tools possible.

Open-source credits

• Open File Viewer – MIT license

Contact

Suggestions for new tools or bug reports: hello@example.com