JSON Formatter
Make JSON readable without changing its numbers. Choose indentation, optionally sort object keys, and get clear syntax and duplicate-key errors.
Load an example or paste your data to begin.
How to use JSON Formatter
- Paste JSON or open a local file.
- Choose indentation and whether object keys should be sorted.
- Format the document, inspect the result and copy or download it.
What to expect
Sorting affects object keys only; array order stays the same. JSON-style comments can be removed safely, but trailing commas and unquoted keys belong in the Fixer. Duplicate keys are rejected so one value cannot silently overwrite another.
Related tools
JSON Formatter FAQ
Are 64-bit integer IDs preserved?
Yes. Formatting retains the numeric text instead of converting large values through JavaScript floating-point numbers.
Does sorting create canonical JSON for signatures?
No. Alphabetical key sorting is for readability. It is not an implementation of a cryptographic JSON canonicalization standard.
Does this tool upload my data?
No. Your input and generated files are processed on your device. No account is required.