JSON Formatter & Validator
Clean, format, and validate your JSON data securely in your browser.
JSON Formatter & Validator
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Why use a JSON Formatter?
JSON (JavaScript Object Notation) is the standard data format for modern APIs, configuration files, and web communication. However, when working with APIs, JSON is often returned minified (all on one line) to save bandwidth. This makes it impossible for humans to read or debug.
Our tool solves this by parsing the messy string and rebuilding it with proper indentation and syntax highlighting.
Key Features:
- Beautify: Turns an unreadable block of text into a clean, hierarchical tree structure.
- Minify: Does the exact opposite. Compress your large JSON files by stripping out all non-essential whitespace before pushing to production.
- Validate: If your JSON is broken, our parser will catch it and output the exact error message so you know where to look.
- 100% Client-Side Privacy: Your data never leaves your computer. Period.
Frequently Asked Questions
Is my JSON data sent to a server?
No. Our JSON Formatter runs entirely locally in your browser using JavaScript. We do not transmit, log, or store your JSON data on any server. Your sensitive data is 100% secure.
What does JSON validation mean?
Validation ensures that your text strictly follows the JSON specification. If you are missing a comma, have trailing commas, or use unquoted keys, the tool will instantly throw an error to help you fix it.
What is JSON minification?
Minification removes all unnecessary whitespace, newlines, and indentation from the JSON string. This drastically reduces the file size, making it ideal for transmitting over networks or storing in databases.
Can I change the indentation size?
Yes, you can choose between 2 spaces, 3 spaces, or 4 spaces using the dropdown menu before hitting the Format button.