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JSON Formatter & Validator

spec-sheet no. 04 / json-tools

Format, minify, and validate JSON instantly. Paste on the left, read the drawing on the right — nothing leaves your browser.

indent
Input valid
Output
/
{
  "service": "auth-api",
  "version": "2.4.1",
  "healthy": true,
  "endpoints": [
    "/login",
    "/logout",
    "/refresh"
  ],
  "limits": {
    "rps": 500,
    "burst": 50
  },
  "owner": null
}
status valid
size 176B → 202B
keys 11
depth 2

About this JSON formatter

This free tool formats, validates, and minifies JSON directly in your browser — nothing is uploaded to a server, so your data stays private. Paste raw or minified JSON to get readable, indented output, or catch syntax errors with exact line and column numbers.

When to use a JSON formatter

Useful for debugging API responses, cleaning up config files, reviewing webhook payloads, or preparing JSON for documentation. Switch to tree view to explore deeply nested objects and arrays without losing your place.