JSON Formatter / Validator
Format, validate, and minify JSON instantly with quick copy and sample actions.
Input JSON
Paste JSON and choose Beautify or Minify.
Output
Use Copy Output once the JSON validates successfully.
Format JSON
Validation status
What it helps with
- Readable API responses
- Quick JSON validation checks
- Compact minified output for transport or storage
How to use
Follow these simple steps to use the tool.
Drop your JSON into the input box or load the sample to test the formatter quickly.
Choose the indentation you want, then format the JSON or minify it into a compact single-line version.
Check the validation message, review the output, and copy the result when it looks right.
What it does
See what this free online tool can help with.
Validates whether the input is real JSON and shows a clear status message.
Formats JSON with readable indentation for easier scanning and debugging.
Can minify valid JSON into a compact single-line output.
Formatter runs in your browser, so your JSON stays on your device.
Supported formats and limits
Review supported inputs, outputs, and practical limits for this tool.
Formats and options
- Plain JSON objects and arrays
- Beautified JSON output
- Minified JSON output
- Modern desktop and mobile browsers
Things to know
- Input must be valid JSON, not JavaScript objects or comments.
- This tool formats structure and whitespace but does not transform field names or values.
- Large payloads may be slower on older devices because formatting happens on your device.
FAQ
Answers to common questions about this tool.
Does this tool fix invalid JSON automatically?
No. It validates the JSON and reports when parsing fails, but it does not guess or rewrite broken syntax for you.
Can I minify JSON as well as format it?
Yes. Use the Minify action to turn valid JSON into a compact single-line result.
Does Bukmrk upload my JSON anywhere?
No. The formatting and validation happen in your browser, so your JSON stays on your device.
Why use a free online JSON formatter?
Readable JSON is easier to debug, share, and inspect when you are working with APIs, config files, or exported data.
This Bukmrk tool focuses on the common tasks you usually need right away: validate JSON, format it cleanly, or minify it for compact output. It is designed for quick work without extra setup.