Make JSON readable.
Paste compact JSON, validate its syntax, and copy a consistently indented result.
🔒 Processed locallyYour input stays on this device and is never uploaded to Boring Tools.
Result
How to use JSON Formatter
A formatter parses JSON and serializes it with predictable whitespace. This makes nested arrays and objects easier to review without changing data types or property values.
Steps
- Paste valid JSON.
- Choose an indentation style.
- Format and copy the result.
Formats, limits, and accuracy
JSON does not allow comments, trailing commas, undefined values, or single-quoted strings. Syntax errors are reported without sending input anywhere.
Frequently asked questions
Does formatting change key order?
The browser normally preserves parsed object key order, but consumers should not depend on object order.
Can it format private API responses?
Yes. Processing is local to the tab.
Practical notes
Formatting validates syntax as part of parsing.
Avoid pasting secrets into any browser extension or untrusted environment.