json
JSON Formatter
Format and beautify JSON
9 free tools
JSON (JavaScript Object Notation) is the backbone of modern web APIs and configuration files. Our free JSON tools let you format messy payloads, validate syntax, minify for production, compare two documents for differences, and convert JSON to CSV, XML, or YAML — all without installing anything or uploading your data to a server.
json
Format and beautify JSON
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Validate JSON input
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Minify JSON
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Compare two JSON documents side by side and highlight differences
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Convert JSON to CSV
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Convert JSON to XML
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Convert JSON to YAML
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Extract all keys from JSON
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Calculate JSON size
A JSON formatter (also called a JSON beautifier) takes compact or minified JSON and adds indentation and line breaks to make it human-readable. It does not change the data — only the whitespace.
Yes. All tools run entirely in your browser using JavaScript. Your data is never sent to any server, making them safe for API keys, tokens, and private configuration files.
Validation checks whether your JSON follows the correct syntax (no trailing commas, proper quotes, balanced brackets). Formatting only changes whitespace for readability. You need valid JSON before you can format it.