JSON Formatter
Pretty-print JSON with 2 spaces, 4 spaces or tabs, and see exactly where it is invalid.
Data
Format
Help improve UNQIRO
Allow anonymous usage statistics? UNQIRO would count only which tool was used, whether it finished and which links between the tools and the Format Lab were followed. Your files, text and results are never included, and this use is not counted.
What the formatter does and does not do
- Values stay exactly as written: Only whitespace changes. The original text is formatted, not parsed into JavaScript numbers, so values above 9,007,199,254,740,991 keep every digit, 1.0 stays 1.0 and escape sequences in strings are kept.
- Nothing is repaired: The JSON standard is followed strictly: comments, trailing commas, single quotes and unquoted keys (JSON5, JavaScript objects) are reported as errors with their position, because other JSON parsers would reject them too.
- Duplicate keys are flagged: JSON allows repeated keys, but most programs keep only the last one. The formatter keeps both and warns you.
Frequently asked questions
Is there a size limit?
Inputs up to 5,000,000 characters work, which covers large exports. Very large results may take a moment to appear in the output field.