How to Validate and Format JSON Online (Free Tool)

Validating and formatting JSON is something every developer does—whether you're debugging an API response or cleaning up minified config. Doing it in the browser saves time and keeps sensitive data off third-party servers. This guide covers what to look for in a good JSON formatter and how to validate syntax, fix common errors, and pretty-print in one click. Try the free tool on [Buggable.dev](https://buggable.dev) for quick, client-side results.