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Format, validate, beautify, or minify JSON data.
Copy your JSON data and paste it into the input field on the left.
Select your preferred indentation size (2, 4, or 8 spaces) and click Format or Minify.
Click the Copy button to copy the formatted or minified JSON to your clipboard.
A JSON formatter takes raw, minified, or messy JSON and turns it into cleanly indented, readable text. It also validates the input, so a missing comma, an unquoted key, or a trailing bracket is caught immediately with a clear error message.
Paste JSON from an API response, a log line, or a config file, choose your indentation, and get formatted output you can actually read. Formatting and validation run entirely in your browser, which matters when the JSON contains tokens, keys, or customer data that should not be pasted into a random website.
APIs and log pipelines usually emit minified JSON with no whitespace to save bytes. That is efficient for machines and unreadable for people. Formatting restores structure: nested objects are indented, arrays are broken into lines, and matching brackets become obvious. Debugging a payload you can read takes a fraction of the time.
The most frequent failures are trailing commas after the last item, single quotes instead of double quotes, unquoted keys, and comments, which JSON does not allow. The validator points at the exact position of the first error so you can fix it and reformat in seconds.
These names all describe the same operation: parsing JSON and re-serializing it with indentation. Whichever term you searched for, this tool does the job, and it also works in reverse when you need to minify JSON back to a single line for storage or transfer.
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