Kitsy AI

📋JSON Formatter

Format, validate, and minify JSON

Want a deeper walkthrough? Read our complete guide to JSON Formatter →

About the JSON Formatter

JSON Formatter beautifies, validates, and minifies JSON. Paste raw or messy JSON and get clean, indented output — or compress it to a single line for transport.

It also flags syntax errors so you can quickly fix malformed JSON from APIs, logs, or config files. All processing is client-side, so your data stays private.

Common use cases

  • Pretty-printing API responses for readability
  • Validating JSON before using it in code
  • Minifying JSON to reduce payload size
  • Debugging malformed configuration files

How to use the JSON Formatter

  1. Paste your JSON into the input area.
  2. Click Format to indent and validate, or Minify to compress it.
  3. Review any error messages if the JSON is invalid.
  4. Copy the formatted or minified output.

Frequently asked questions

Will it tell me where my JSON is broken?

Yes, invalid JSON produces an error message indicating the problem so you can fix it.

Is my JSON sent anywhere?

No, formatting and validation run entirely in your browser.

Can it handle large JSON files?

Yes, though extremely large documents may format more slowly depending on your device.

Does it support minification?

Yes, you can collapse JSON to a single compact line to reduce size.