Category
Free Online Developer Tools
Essential utilities engineered for software engineers, API developers, and data specialists.
JSON Formatter & Validator
Format, beautify, minify, and validate JSON data with instant syntax error locating and tree view.
Open Formatter
Regex Tester & Debugger
Test, validate, and debug regular expressions in real-time with match highlighting and capture group inspection.
Test Regex
URL Encoder / Decoder
Encode and decode URLs, query strings, and percent-encoded characters instantly in your browser.
Encode & Decode
FAQ
Developer Tools FAQ
Is it safe to paste proprietary JSON or API responses?
Yes. The JSON Formatter runs entirely in your local browser sandbox. No input is ever sent over the network or saved anywhere.
Does the validator show the exact line of syntax errors?
Yes. Our validator inspects the error pointer and displays exact line and column numbers to help you fix syntax problems instantly.