JSON Formatter & Validator
Beautify, minify and validate JSON with exact line and column error locations.
🔒 Your JSON never leaves your browser.
What you can do
Paste JSON and click Beautify to indent it with 2 spaces, 4 spaces or tabs, or Minify to strip whitespace into a single line. Turn on Sort keys to reorder every object key alphabetically and recursively, which makes diffing and reviewing much easier.
Precise error locations
When the JSON is invalid, the parser message is shown together with the exact line and column where it broke, so missing commas, unclosed brackets or single quotes are easy to spot. Valid JSON shows a confirmation along with input and output character counts.
Private by design
Copy the result or download it as a .json file. All parsing, formatting and validation run entirely in your browser, so responses containing tokens or personal data never leave your device.
Frequently asked questions
Does it show where my JSON is broken?
Yes. On a parse error it shows the browser parser message along with the line and column of the failure, helping you find missing commas or unclosed brackets fast.
What is the difference between Beautify and Minify?
Beautify adds indentation and line breaks for readability, while Minify removes all whitespace to shrink the payload. Both validate the JSON before reformatting it.
Is my JSON uploaded?
No. Everything runs in your browser and nothing is sent to a server, so sensitive API responses and config files stay completely private.