Format JSON with readable indentation while preserving exact numbers, escaped strings and the original member order.
Input
Paste JSON or import a UTF-8 file up to 100 MB. Text up to 1,048,576 characters can be edited here.
0 characters · Input is editable.
Only whitespace outside strings changes. Large integers, exponent notation, negative zero, escapes and duplicate object members are preserved. Consuming applications may interpret them differently.
Output
Your result will appear here after processing.
Your JSON stays in this browser. No account required.
Frequently Asked Questions
Is JSON formatting with PDFPilot really free?
Yes. JSON Formatter is completely free to use, with no sign-up or account required.
Are my files uploaded to a server?
No. Formatting and syntax checks run entirely in your browser. Your text and files are never uploaded to PDFPilot's servers.
Does this also validate my JSON?
Yes — formatting requires a successful parse first, so malformed JSON produces a clear error instead of a broken result. Use JSON Validator if you just want a validity check without downloading a formatted file.
What indentation does the output use?
Choose 2 spaces, 4 spaces or a tab per nesting level. The default is 2 spaces.
Does formatting change my data in any way?
Only whitespace outside strings changes. Original numeric spelling, string escapes, member order and duplicate object members are preserved. Other applications may interpret extreme numbers or duplicate members differently.
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