Pretty JSON
Format or minify JSON instantly for APIs, logs and config files.
Input JSON
124 characters
Valid JSON objects and arrays are supported.
Result
Use Format or Minify to generate output.
100% local processing in your browser
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Benefits
- Reduces reading errors in large payloads.
- Switch quickly between readable and compact output.
- Shows clear syntax errors for invalid JSON.
What a JSON formatter adds to data review
A JSON document can be valid and still be difficult to inspect when it arrives minified or contains deeply nested objects and arrays. This tool changes presentation without changing keys or values.
- When it is useful
- It is useful for API responses, configuration files, webhooks and documentation samples. Indentation exposes nested properties, while minification prepares a compact representation for transport or comparison.
- Privacy and scope
- Text is parsed and transformed in the browser. The JSON is not sent to a remote service, which matters when samples contain internal identifiers, settings or test data.
- Result limitations
- Output is produced only for valid JSON syntax. JSON does not support comments, trailing commas, unquoted keys or values such as undefined, even though some of those constructs exist in JavaScript.
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Frequently asked questions
What if I paste invalid JSON?
The tool shows a clear error and no output until it is fixed.
Is my JSON sent to a server?
No. Processing happens locally in your browser.
Pretty-print or minify JSON for cleaner API workflows
Pretty JSON helps developers inspect payloads faster and catch syntax issues before shipping.
Switch between readable and compact output in one step to speed up debugging and documentation.