Clear parse errors
Invalid JSON returns the browser parser message instead of silently changing data.
JSON Formatter and Validator
Validate, format with 2 or 4 spaces, or minify JSON privately in your browser.
JSON Formatter and Validator
Validate, format, or minify JSON directly in your browser.
0 lines · 0 characters
All processing happens locally in your browser.
How to use JSON Formatter and Validator
- 1
Paste the JSON document into the input field.
- 2
Choose two-space, four-space, or minified output.
- 3
Process the input to validate it and copy or download valid JSON.
Why use this tool?
Formatting choices
Pretty-print for readability or minify for compact transfer.
No data transmission
JSON content is parsed locally and is not submitted to a server.
Frequently asked questions
Does the formatter change JSON values?
No. It parses and serializes the same data structure while changing whitespace only.
Why is my JSON invalid?
Common causes include trailing commas, single-quoted strings, comments, or missing quotation marks around keys.
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