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JSON Formatter & Validator

Beautify, minify, and validate JSON data

How to use the JSON Formatter & Validator

Paste your JSON into a JSON formatter to beautify it with clean indentation, minify it to a single line, or validate it for errors. Invalid JSON is flagged so you can fix syntax problems fast. It runs free in your browser with no signup, and nothing is uploaded.

  1. Paste your JSON Drop your raw or messy JSON into the input box.
  2. Choose an action Click beautify to indent it, minify to compress it, or validate to check for errors.
  3. Review and fix errors If validation fails, read the error message and correct the flagged syntax.
  4. Copy the result Copy the formatted or minified JSON to use in your code or config.

Frequently Asked Questions

JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It's human-readable and widely used in web APIs, configuration files, and data storage.

Paste your JSON into the input box and click "Format (Beautify)". The tool will add proper indentation and line breaks to make it readable. You can adjust the indent size to your preference.

Minifying removes all unnecessary whitespace, line breaks, and indentation from JSON, creating a compact single-line format. This reduces file size, which is useful for APIs and storing JSON data efficiently.

The tool automatically validates JSON when you format or minify it. If the JSON is invalid, you'll see an error message explaining what's wrong. Common errors include missing commas, brackets, or quotes.

Yes! All JSON formatting happens in your browser using JavaScript. Your data is never sent to our servers or stored anywhere. It's completely private and secure.

Common errors include: trailing commas after the last item, single quotes instead of double quotes, unquoted keys, missing closing brackets or braces, and invalid escape sequences. The validator will help identify these issues.

Yes, but very large files (>1MB) may slow down your browser since processing happens client-side. For extremely large JSON files, consider using command-line tools like jq or your code editor.

2 spaces is the most common standard for JSON formatting. It provides good readability without making files too wide. Some teams prefer 4 spaces. Choose what matches your team's coding standards.

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