Free developer tools – JWT, Base64, UUID, hash, regex, cron and more

Table of Contents

Why browser-only?

Many “free online tool” sites send your input to a server before they show a result. That is fine for a JSON formatter, and not fine for a JWT, a hash, or anything else where the input might hold a secret. Every tool here runs in your browser. Nothing you type or open is uploaded.

Built on what we use ourselves

GoRest is a public REST API with fake data, and a place to try REST. These tools are the ones we reach for when we debug a request, prepare a fixture, or check a token.

Suggest a tool

If you want a tool that is not here, ask in Q&A or write to the address on the about page.