TOOLGENIEJSON Formatter — Beautify JSON Online
Format and beautify JSON in your browser. Paste compact JSON, choose 2- or 4-space indent, optionally sort keys, then copy or download the readable result.
Everything runs in your browser. Press Ctrl/Cmd+Enter to format.
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How to Format JSON Online
- Paste minified JSON or upload a file.
- Choose 2-space or 4-space indent. Optionally sort keys.
- Click Format JSON, then copy or download the readable result.
About This JSON Formatter
This formatter exists to beautify JSON — not to be a full editor. Create or rewrite files in the JSON editor. Check a broken payload in the JSON validator. Compact it again with the JSON minifier.
Frequently Asked Questions (FAQ)
How do I format JSON online?
Paste JSON, pick an indent, and click Format JSON. The output is pretty-printed in place.
What indent should I use for JSON?
2 spaces is the usual default. 4 spaces is a readability preference. Both parse the same.
Can I sort JSON keys while formatting?
Yes. Sort keys reorders object keys alphabetically, including nested objects.
Does formatting change JSON values?
No. Only whitespace changes unless you also sort keys, which changes key order only.
What if the JSON will not format?
It is invalid. Validate it, fix the error, then format again. See JSON examples for a known-good starting point.
Tips for Readable JSON
- Format API responses before you hunt for a nested field.
- Sort keys when you are comparing two configs by eye.
- Minify only after you have confirmed the formatted version is correct.