JSON Formatter
Format, minify, validate and unescape JSON right in your browser.
How to use
- 1
Input
Paste JSON or load from a file.
- 2
Transform
Format, minify or validate.
- 3
Copy
Copy or download the result.
Features
- Format minified JSON with proper indentation
- Instant syntax error detection
- Minify and unescape support
- Works in your browser - no installation needed
Use cases
Debug API responses
Format one-line API responses to quickly find the data you need.
Inspect config files
Beautify minified configuration JSON to review and edit its contents.
Analyze log data
Format JSON logs to make errors and patterns easier to spot.
Details
JSON is one of the most common data formats in modern web development, used in API responses and configuration files. However, minified one-line JSON is hard to read and errors are difficult to spot.
The format function expands minified JSON with proper indentation. Minify does the opposite when you need to minimize file size. Validate instantly detects syntax errors.
This tool is perfect for API development and debugging - no installation needed, and sensitive data never leaves your browser.
FAQ
Can I format very large JSON files?
It depends on your browser memory, but typical API responses and config files are handled without issue.
Can I unescape escaped JSON?
Yes. Pasted escaped JSON is automatically interpreted when formatting or validating.
Can it convert CSV to JSON?
Not in the current version. This tool focuses on formatting, minifying and validating JSON.
Can I add comments to JSON?
No. Comments are not allowed in the JSON format.
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Verified: Input, formatting, errors and copy behavior are maintained as regression flows
Did you know?
JSON became an independent standard (RFC 8259) based on JavaScript notation.