Free developer and QA tools
Small, focused tools for everyday development and testing work. They are free, need no account, and run entirely in your browser, so what you paste stays on your device.
JSON Formatter & Validator
Format, validate and minify JSON in your browser. Shows the line and column of errors, keeps large numbers exact.
URL Encoder & Decoder
Percent-encode or decode text and URLs in your browser, with clear errors for malformed input and a URL parser.
Why use these tools
- Private by design. Processing happens in your browser. Nothing you enter is sent to a server or stored.
- No signup. Open a tool and use it. There is no account, trial or email gate.
- Strict and specific. Checks follow the relevant standard, and errors say where the problem is and why.
Need to test a whole website, not just a snippet?
RoboQA tests real pages and user journeys in a browser: logins, forms, clicks and full flows. See what RoboQA can test or compare plans.