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How to Use
- 1Paste your raw or minified JSON into the input area.
- 2Click Format to prettify with 2-space indentation and syntax highlighting.
- 3Review validation errors displayed below if the JSON is invalid.
- 4Click Minify to compress formatted JSON into a single line.
- 5Click Copy to save the formatted or minified result to your clipboard.
About JSON Formatter & Validator
The JSON Formatter & Validator prettifies minified JSON and validates syntax in one step. Paste any JSON string — from an API response, config file, or database export — and instantly see it formatted with proper 2-space indentation.
When your JSON contains errors, the tool shows descriptive messages pinpointing the issue: unexpected tokens, missing commas, unmatched brackets, or invalid escape sequences. This makes debugging malformed JSON far faster than scanning raw text manually.
The Minify button compresses formatted JSON into a single line — useful for reducing payload size, storing in environment variables, or pasting into fields that expect single-line input. All parsing uses the native JSON.parse() and JSON.stringify() APIs in your browser.
Frequently Asked Questions
What indentation does the formatter use?
JSON is formatted with 2-space indentation by default, producing clean, readable output that matches common coding conventions.
Can it minify JSON as well as format it?
Yes. Click Minify to compress JSON into a single line with no whitespace, ideal for reducing file size or pasting into configuration fields.
How does validation work?
The tool uses the browser's native JSON.parse(). If parsing fails, the error message describes what went wrong and approximately where, so you can fix the issue quickly.
Is my JSON data sent to any server?
No. All formatting and validation runs locally in your browser using native JavaScript functions. No data is transmitted anywhere.
Can I format JSON with comments?
Standard JSON does not support comments. If your input contains // or /* comments, they must be removed before the JSON can be parsed. JSONC (JSON with Comments) is a separate format.