JSON Beautifier
Beautify messy JSON online into clean, indented, readable text. Choose 2 or 4 spaces or tabs, and sort keys. Free, in your browser.
How to use the JSON Beautifier
Validate, beautify and clean JSON, CSV, XML and YAML.
- Paste or upload your data
- Choose the options
- Copy or download the result
Tips
- Invalid JSON shows the exact line and column. “Auto-fix” repairs comments, trailing commas and single quotes.
- Numbers and key order are kept exactly as written – nothing is rounded.
- CSV: any delimiter is detected automatically; pick the one you want for the output.
- YAML: comments are kept, and you can convert YAML → JSON or paste JSON to get YAML.
Example
Input: {"a":1,"b":[1,2]}
Output: {
"a": 1,
"b": [
1,
2
]
}
Frequently asked questions
How do I beautify JSON?
Paste it, choose Beautify and your indent size, then copy or download the result.
Can I sort the keys?
Yes. Tick Sort keys A to Z to make two JSON files easy to compare.
Will large numbers change?
No. Unlike many tools, long numbers like 12345678901234567890 are kept as they are.
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