TechToolExpert is a collection of fast, free, browser-based tools for developers - JSON formatters and validators, encoders and decoders, converters, hash and UUID generators, and more. Everything runs locally in your browser: your data is never uploaded to a server.
Why we built this
Developers reach for the same small utilities every day: formatting a messy JSON payload, decoding a JWT, generating a UUID, hashing a string. Most online tools are cluttered with ads, slow, or send your data to a server. We wanted clean, instant tools that respect your privacy and just work.
How it works
Each tool is a self-contained widget that processes input entirely client-side using standard web APIs. There is no sign-up, no paywall, and nothing to install. Paste your input, get your result, copy it, and move on.
Contact
Found a bug or want a tool added? Email us at [email protected]. We read everything and prioritise the tools developers ask for most.