Free Tool
JSON Pretty Formatter
Pretty print, validate, and minify JSON in your browser.
JSON Pretty Printer and Minifier
The JSON pretty formatter validates JSON, formats it with indentation, and can minify it into one line without uploading your data.
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JSON Formatter FAQ
Can it detect invalid JSON?
Yes. A parsing error message is shown when the input is invalid.
Is JSON uploaded to a server?
No. Parsing and formatting run in your browser.
Can I minify JSON?
Yes. You can convert formatted JSON into one-line JSON.