JSON Formatter & Beautifier
What is JSON Formatting?
JSON formatting (beautifying or pretty-printing) takes compact or minified JSON and reformats it with indentation, line breaks, and spacing to make it human-readable. JSON is the standard data format for REST APIs, configuration files, and data exchange, but compact JSON from network requests or build tools is nearly impossible to read manually. Formatting lets you inspect the structure at a glance, verify that values are correct, and navigate nested objects. Most code editors have built-in JSON formatters, but this online tool is handy for quick checks without needing an IDE.
How to Use the JSON Format Tool
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Paste your JSON data (minified, compact, or already formatted) into the input box.
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Click 'Format JSON' — the prettified JSON appears with indentation and line breaks.
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If the JSON is invalid, an error message will show the problem location.
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Copy the formatted result for use in your editor, documentation, or API tests.
This JSON formatter runs entirely in your browser — no data is sent to any server. Also validates JSON syntax and highlights errors. Supports arrays, objects, nested structures, and all JSON value types. Useful for reading API responses, inspecting configuration files, and reviewing data from logs.
Frequently Asked Questions
Does JSON formatting change the data? No. Formatting only adds or changes whitespace. The JSON values, keys, and structure remain identical. A browser or application parsing the formatted JSON produces exactly the same JavaScript object as the minified version.
What is the difference between JSON format and JSON minify? JSON formatting adds indentation and line breaks for readability. JSON minifying removes all whitespace to reduce file size. Both produce functionally identical JSON. Use formatting for development/debugging and minifying for production payloads.
Why does my JSON show a parse error? Common JSON errors: trailing commas (not allowed in JSON, unlike JavaScript), single quotes instead of double quotes, unquoted key names, missing commas between items, and incorrect escape sequences in strings.
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