JSON Formatter & Validator

Beautify, minify and validate JSON with precise error location.

This tool runs entirely in your browser — no data is uploaded to our servers.

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What is the JSON formatter and validator?

JSON is a text format for exchanging data between apps and APIs. It powers store settings, theme configs, exports and the structured data search engines read. Data often arrives minified on one long line, and a single tiny mistake can break a whole system. This tool makes JSON readable, validates it and pinpoints errors.

How to use it

  1. Paste your JSON into the editor.
  2. Click Beautify to indent it (2 spaces, 4 spaces or tabs).
  3. Click Minify to strip whitespace and reduce size for production.
  4. Click Validate to find errors; the message and position are shown and highlighted.
  5. Enable Sort keys A–Z to compare files or review long configs.

Common JSON errors and fixes

  • Trailing comma after the last item — remove it.
  • Single quotes — replace with double quotes.
  • Unquoted keys — every key needs double quotes.
  • Comments — standard JSON does not allow them.
  • Unclosed brackets — every opening bracket needs a closing one.

Who is it for?

  • Developers reading API responses and debugging configs.
  • Store owners reviewing theme settings or exports before uploading.
  • SEO specialists checking JSON-LD structured data.

Privacy

Everything is processed in your browser; nothing is sent to a server, so you can safely format files containing API keys or customer data. Still, never share secret keys publicly.

Frequently asked questions

Most common JSON errors?

Trailing commas, single quotes, unquoted keys and comments.

Beautify vs minify?

Beautify adds whitespace for readability; minify removes it to reduce size. The data itself is unchanged.

Is my data sent to a server?

No, everything is processed locally.

Can I check JSON-LD?

Yes — paste the content without the script tags to validate the syntax.