JSON Formatter
Free online JSON tool: format, prettify, minify, validate, error hints, copy, and JSON tree view.
Key features
- Format/prettify JSON for readability
- Minify JSON for sharing
- Helpful error hints
- Tree view for nested structures
FAQ
Does this JSON tool upload my data?
No. JSON parsing and formatting are done locally in your browser.
Why is my JSON invalid?
Common causes: missing quotes, trailing commas, mismatched braces, or illegal characters.
How do I minify JSON into one line?
Switch to “Minify” mode to output a single-line JSON string.