JSON Formatter & Validator
Instantly format, minify, sort, escape, unescape, and validate your JSON data.
Input
Output
Choose an operation to see results
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.
This tool helps you work with JSON by providing various operations to make it more readable, compact, or to ensure its correctness.
How to Use This Tool
- Input JSON: Paste your JSON data into the "Input JSON" textarea.
- Choose Operation: Select an operation like "Format", "Minify", "Sort Keys", "Escape", "Unescape", or "Validate".
- View Output: The result will appear in the "Output JSON" textarea. If validating, a success or error message will be displayed.
- Stats: Observe real-time statistics about your JSON, including line count, depth, key count, and size.
- Copy: Use the copy button to quickly grab the output.
Common Use Cases
- API Development: Quickly format or validate JSON payloads for requests and responses.
- Debugging: Make unreadable, minified JSON from logs or network requests human-readable.
- Data Transfer: Minify JSON to reduce payload size for faster data transfer.
- Configuration Files: Ensure your JSON configuration files are correctly structured.
- Code Generation: Escape JSON for embedding into string literals in various programming languages.
Frequently Asked Questions
What is a JSON formatter?
A JSON formatter is a tool that takes JSON data and formats it in a human-readable way with proper indentation and line breaks. It makes complex nested JSON structures easier to understand and debug.
Is this JSON formatter free to use?
Yes, FastDevTools JSON Formatter is completely free to use with no signup required. All processing happens in your browser, ensuring your data remains private.
Does the JSON formatter store my data?
No, all JSON processing happens entirely in your browser. Your data never leaves your device and is not sent to any server. This ensures complete privacy and security.
What is JSON minification?
JSON minification removes all unnecessary whitespace and formatting from JSON data, making it smaller in size. This is useful for reducing file size and improving data transfer speeds.
How do I validate JSON?
Simply paste your JSON into the input field and click "Validate". The tool will check if your JSON is properly formatted and show any syntax errors if found.
Can I sort JSON keys alphabetically?
Yes, use the "Sort Keys" feature to alphabetically sort all keys in your JSON object. This is helpful for comparing JSON files or maintaining consistent formatting.