JSON format
Format, beautify and validate JSON data, support syntax highlighting and error detection
Formatting settings
Input JSON
1
Format result
1
Private & SecureRuns in your browser — nothing is uploaded
Easy to UseJust paste or type — instant results
Free ForeverUnlimited use, no sign-up
Fast & ReliableAdvanced tech, fast and stable
Minified or messy JSON is hard to read, and spotting structure in one long line is painful. Paste your JSON to get it formatted with clean indentation, so nesting, arrays and keys are easy to scan, all in your browser.
How to use the JSON formatter?
- 1Enter inputEnter or paste JSON into the left input
- 2Set optionsChoose formatting settings (indent, output format)
- 3ProcessClick Format to view the result on the right
- 4Get resultCopy or download the formatted JSON
Common use cases
Read an API responseTurn a one-line API payload into something you can actually read.
Indent consistentlyApply even two- or four-space indentation across the whole file.
Spot the structureSee nesting and arrays laid out so the shape is obvious.
Tidy before committingClean up a config file so its diffs stay readable.
Good to know
Formatting changes layout, not dataIndenting only adds whitespace; the values and structure are untouched. The formatted and minified versions are the same JSON.
Key order may stay or shiftMost formatters keep keys in their original order, but JSON itself does not guarantee order. Do not rely on position for meaning.
It checks structure, not meaningFormatting fails on broken JSON, but valid JSON with wrong values still formats fine. It is not a correctness check.
Big files lean on your deviceEverything runs in the browser, so a very large file depends on your machine's memory. Split huge payloads if it stalls.