JSON Formatter

JSON Formatter – Format & Validate JSON Online

Use this free JSON formatter to pretty-print, validate, and inspect JSON data in your browser. Paste a JSON string, click format, and instantly see a clean, indented tree that’s easy to read and debug.

The tool works as a convenient js json formatter whenever you’re working with JavaScript objects, API responses, or configuration files.

What the JSON Formatter Does

The CodersTool js json formatter helps you:

• Beautify JSON – Add line breaks and indentation so complex objects are easy to scan.
• Validate JSON syntax – Quickly spot missing commas, unmatched braces, and other common mistakes.
• Inspect nested structures – Expand and collapse nodes (if the UI supports it) to focus on what matters.
• Prepare JSON for sharing – Produce readable output for documentation, tickets, or code reviews.

How to Use the JS JSON Formatter

1. Paste your JSON

1. Copy JSON from your code, API client, or logs.
2. Paste it into the input field of the js json formatter.

2. Click “Format JSON”

1. The tool parses your input and checks for syntax errors.
2. If valid, it outputs formatted JSON with proper indentation.
3. If invalid, you’ll see an error message with clues about what went wrong.

3. Copy or download the result

1. Copy the formatted JSON to your clipboard.
2. Optional: download it as a file to use in tests, mocks, or configuration.

Why Use an Online JS JSON Formatter?

• Faster debugging – Instead of manually adding line breaks, let the formatter show you the structure immediately.
• Works anywhere – No need to install a plugin or editor; open the page and format JSON from any device.
• Great for demos & teaching – Students and teammates can see clearly structured JSON in one click.
• Pairs well with APIs – Use it side-by-side with REST or GraphQL tools to inspect payloads.

Related JSON Tools

• JSON Editor – Edit and validate JSON directly in the browser.
• JSON Escape / Unescape – Fix escaping issues in JSON strings.
• JSON to C# Class – Generate C# models from JSON.
• JSON to Java Class – Generate Java classes from JSON.

Use this js json formatter any time you need to quickly clean up or validate JSON for development, debugging, or documentation.