How to Format & Validate JSON (the fast way)

This takes 10 seconds — no installs, no signups.

1. Go to ZZBOLT JSON Formatter.
2. Paste your JSON into the box.
3. Click Format to pretty-print, or Minify for compact output.
4. If something breaks, the validator shows the error message and location.
5. Click Copy to use it in your code or API request.

Common errors (and fixes)

• Use double quotes for keys/strings — JSON doesn’t allow single quotes.
• Remove trailing commas after the last item in arrays/objects.
• Validate with the tool to pinpoint the exact character causing issues.