JSON Format/Validate

Why use this JSON formatter?

Format, validate, and inspect JSON locally in your browser. This is useful when you need to clean up an API response, check a configuration file, or make a compact payload readable before sharing it in a pull request, support ticket, or debugging note.

The parser runs in the page with JSON.parse. Your JSON is not uploaded to OhMyApps, so it is a practical choice for everyday snippets that you do not want copied into a full online editor or account-based workflow.

How it works

Paste or type JSON in the input panel. The tool will automatically:

• Validate - Check for syntax errors and show helpful error messages
• Format - Pretty-print with your chosen indentation
• Highlight - Color-code keys, strings, numbers, and booleans
• Navigate - Click any value to see its JSON Path

Use the Sample button to load example JSON, or Clipboard to paste from your clipboard.

Common JSON errors it catches

• Trailing commas after the last item in an object or array
• Missing quotation marks around object keys
• Single quotes instead of JSON double quotes
• Unclosed braces, brackets, or strings
• Comments copied from JavaScript into strict JSON

Format vs minify vs validate

Formatting adds indentation so nested objects are easier to read. Validation checks whether the input is legal JSON. Minifying removes whitespace for production payloads; use the dedicated JSON Minify tool when you need compact output.

Nearby tools can continue the workflow: JSON Diff, JSON Path Tester, JSON to YAML, and JSON to CSV.