About DiffCheck

The Company Behind DiffCheck

DiffCheck is a product built and operated by ITERATE AI LTD, a company registered in England and Wales. We build privacy-respecting software tools for developers and professionals worldwide.

What is DiffCheck?

DiffCheck.org is a free, browser-based toolkit for developers. It provides text diff, JSON diff, YAML diff, code comparison, formatters, encoders, and a growing set of utilities — all running entirely in your browser with no server-side processing.

There is no sign-up, no account, and no data collection. Whatever you paste into DiffCheck stays on your device.

Our Principles

• Privacy first — all tool operations run client-side in your browser. No input data is ever sent to our servers.
• Free, always — every tool on DiffCheck is free to use with no rate limits or paywalls.
• No friction — no sign-up, no email required, no extensions to install unless you want one.
• Built for developers — tools are designed around real developer workflows: diffing configs, formatting JSON, decoding JWTs, and more.

Contact

For questions, feedback, or business inquiries, visit our contact page or open an issue on our GitHub repository.