Developer tools that
stay on your machine

Five tools for the jobs you shouldn't paste into somebody else's website. Each one does a single job on a single screen, and none of them send your data anywhere. Free, no sign-up.

• JSON diffCompare two JSON files
• JWT decoderRead a token without sending it anywhere
• Hash generatorHash some text, or a whole file
• Cron explainerWhat that schedule actually means
• Regex testerSee what your pattern matches

Nothing is uploaded and nothing is saved. It all happens on your own device.