IT Consulting
Illustration of curly braces representing JSON, aligned indented lines for formatting, a checkmark for validation, and compressed arrows for minifying

JSON Formatter / Validator / Minifier

Paste JSON below. Everything happens in your browser — nothing is ever uploaded, which matters since pasted JSON is often an API response, a config file, or something with tokens in it.

ℹ️ What each button does
  • Format — re-indents valid JSON using the chosen indent (2 spaces, 4 spaces, or a tab), optionally sorting object keys alphabetically.
  • Minify — strips all whitespace down to the smallest valid representation, same content.
  • Validate only — checks the JSON without changing it, reporting the exact line and column of the first problem found, when the browser's error message includes a position.
  • Uses the browser's native JSON.parse/JSON.stringify on this page — no server call, no upload, no logging of what you paste. The JSON API below is a separate, opt-in endpoint for scripts.
💻 Show API usage examples (cURL) 
curl -sS "https://devops.majbase.com/json-tool/api" \
    --data-urlencode 'json={"b":1,"a":2}' \
    --data-urlencode 'action=format' \
    --data-urlencode 'indent=2' \
    --data-urlencode 'sort_keys=true'

Returns {"valid": true, "result": "{\n \"a\": 2,\n \"b\": 1\n}"}. Use action=minify for compact output, or action=validate to just check it — either returns {"valid": false, "error": "..."} on invalid JSON instead.