JSON Formatter
Format, validate and minify JSON
About the JSON Formatter
This free online JSON formatter and validator beautifies, minifies, and validates JSON instantly in your browser. Paste raw or minified JSON to pretty-print it with 2 spaces, 4 spaces, or tabs, sort object keys alphabetically, and catch syntax errors with exact messages. Nothing is uploaded — parsing runs entirely client-side, so API responses, config files, and sensitive payloads stay private.
How to use
- 1Paste your JSON into the input box.
- 2Choose an indent style — 2 spaces, 4 spaces, or tabs.
- 3Click Format to beautify, Minify to compress, or Sort keys to alphabetize.
- 4Copy the validated output with one click.
FAQ
Is my JSON uploaded to a server?
No. Parsing and formatting happen entirely in your browser with JavaScript's native JSON engine.
Does it validate JSON?
Yes — invalid input shows the exact parser error message so you can fix the syntax.
Related Text & Code tools
JSON Formatter is part of DevKit — 100 free, privacy-first tools for developers, students, and everyone, built by Minhazul Ashim. Everything runs in your browser; your data never leaves your machine.