Dev / ITpopular

JSON Formatter

Free online JSON formatter, validator, and minifier. Instantly beautify and pretty-print messy JSON into clean, readable, indented output with syntax highlighting. Validate JSON syntax and get clear error messages pointing to exactly where your JSON is broken. Minify and compress JSON by removing whitespace for production use. Supports indent sizes of 2 or 4 spaces. Works with large JSON files entirely in your browser — no data is uploaded to any server.

indent
input · json
output · formatted
Formatted JSON will appear here...

how to use

  1. 1.Paste or type your JSON into the input field
  2. 2.Click Format to beautify with proper indentation
  3. 3.Use Validate to check for syntax errors
  4. 4.Click Minify to compress JSON for production

frequently asked

What is the maximum JSON size supported?

The tool handles JSON up to several MB in size. Very large files may slow down your browser.

Does it support JSON with comments (JSONC)?

Standard JSON does not allow comments. The validator will flag comments as errors per the JSON spec.