When to use JSON Formatter

Reading API responses
Cleaning config files for review
Comparing nested structures visually

Example

Input

{"ok":true,"items":[1,2]}

Output

{
  "ok": true,
  "items": [
    1,
    2
  ]
}

How to use

Paste JSON. Invalid JSON will surface a parse error.
Format. Run to pretty-print with indentation.
Share readable JSON. Copy the formatted document.

Processing and limitations

Uses JSON.parse and two-space JSON.stringify output. Comments, trailing commas and single quotes are rejected. Duplicate keys retain the last value, and very large integers may lose precision; retain the original when those details matter.

Reference

Benefits

Free to use—no account required
Runs in your browser
Instant results with no software install
Basic processing does not upload your content to a server
Trailing commas and comments are not valid JSON and will fail parsing.

Not the same as

Only need a yes/no validity check? Use JSON Validator.

JSON Formatter