Tool guides

JSON tools online — format, convert & validate

Format, minify, convert and inspect JSON in your browser — CSV, YAML, XML, JWT and GraphQL helpers with no upload.

Frequently asked questions

Are JSON payloads sent to a server?

Formatter, minify and most converters run locally. Network is used only when a tool explicitly fetches remote URLs.

Which tool should I use first?

Open JSON Formatter to validate syntax, then use linked guides for CSV, YAML, JWT or GraphQL tasks.

Is this free without an account?

Yes — all linked tools are free and require no sign-up.