ONE SMALL TASK, DONE.
JSON Formatter & Validator
Validate JSON and produce an indented or compact version.
Processed on your devicePaste text, open a file or try the sample to begin.
Your result
How to use
- Paste JSON.
- Choose 2-space, 4-space or compact layout.
- Copy or download the formatted JSON.
Good to know
Accepts standard JSON, including top-level strings, arrays and numbers. Comments and trailing commas are rejected.
Formatting preserves the source number spelling and key order. Duplicate keys are rejected by the object-conversion tools, but are retained here.
Text files up to 5 MB are supported. Downloads are encoded as UTF-8.
Your input is processed by this tool on your device. It is not uploaded to our server. Advertising uses external services. Social and coffee links open external websites.
Questions
Where is the error in my JSON?
When JSON is invalid, the message shows the browser’s description of the problem, usually with its position.
Are large numbers rounded?
No. Numbers keep the exact digits you pasted because formatting works on the original text.
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