How do I pretty print JSON online?

Paste your JSON, click Beautify and Validate, then copy the formatted output. Everything runs in your browser.

No. We do not store or log your JSON. Everything runs client-side.

What happens if my JSON is invalid?

The validator will show an error so you can fix the syntax.

JSON Beautifier & Formatter

Pretty-print, validate, and debug JSON in your browser.

Paste JSON:

Output

Processes input in your browser Privacy policy

About this tool

This tool formats and validates JSON so you can quickly spot syntax errors, improve readability, and safely paste JSON into code, logs, or documentation. Read our JSON formatting best practices guide for standards and tips.

How to use this tool

Paste your JSON into the input area.
Click Beautify & Validate.
Fix any errors shown if validation fails.
Copy the formatted JSON when you are satisfied.

Examples

{"user":"alice","active":true}

?
{
  "user": "alice",
  "active": true
}

FAQ

How do I pretty print JSON online?: Paste your JSON, click Beautify & Validate, then copy the formatted output. Everything runs in your browser.
Is my JSON stored?: No. We do not store or log your JSON. Everything runs client-side.
What happens if my JSON is invalid?: The validator will show an error so you can fix the syntax.

Common use cases

Pretty-print JSON API responses for debugging.
Validate JSON before committing config files.
Format minified JSON from logs or network traces.
Prepare readable JSON for documentation or reviews.

Limitations

Invalid JSON cannot be beautified until syntax errors are fixed. Very large payloads may slow down the browser tab.

Privacy note

This tool is designed to process input directly in your browser. Do not paste passwords, private keys, or highly sensitive data into any online tool unless you fully understand how it processes data. See our privacy policy.

Last updated: July 2026