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JSON Formatter

Format, minify, and validate JSON. Nothing leaves your browser.

About this tool

Format, validate and minify JSON. Helpful for inspecting API responses and config files.

Features

  • Pretty-print with custom indent
  • Minify
  • Strict validation with line/column errors
  • Sort keys alphabetically

How to use it

  1. Paste JSON.
  2. Pick format or minify.
  3. Copy the result.
🔒 100% private

Everything happens inside your browser using JavaScript and WebAssembly. Your files are never uploaded to a server, never stored, and never seen by us.

Frequently asked questions

Will it accept JSON5 / comments?

Strict JSON only. Strip comments before pasting.