JSON Formatter
Format, validate, and compact JSON for quick review and cleanup.
JSON Formatter
Format, validate, and compact JSON for quick review and cleanup.
About this json formatter
The JSON formatter parses JSON and re-prints it with clean indentation, so a dense API response or config file becomes readable at a glance. The same parse step validates the data: if a comma, quote, or bracket is missing, it flags the structure as invalid rather than silently mangling it.
It also compacts JSON back to a single line when you need a minified value for a test, a query string, or a storage field. Format while you debug and minify when you copy — and strip tokens or personal data before pasting anything sensitive into any online tool.
Common uses
- Pretty print API responses, webhook payloads, package data, and configuration files before debugging.
- Validate copied JSON and find syntax issues such as missing commas, quotes, brackets, or braces.
- Minify JSON when you need compact data for tests, examples, snippets, or storage fields.
Helpful tips
- Remove tokens, customer data, and private URLs before formatting JSON online
- Use formatted JSON for debugging and minified JSON for compact copy-paste
- Validate again after editing nested objects or arrays
How to use JSON Formatter
- Paste or enter a small code, data, text, URL, or configuration sample before using JSON Formatter on a larger task.
- Remove secrets, tokens, private URLs, customer data, and production credentials before testing examples online.
- Run the tool and review the generated code or data for syntax, escaping, formatting, and target-environment compatibility.
- Copy the result into a test file, sandbox, API client, or staging environment before using it in production.
- Use related developer tools when you need to format, encode, decode, minify, inspect, or validate another step.
Frequently asked questions
Can this JSON formatter validate JSON?
Yes. Paste JSON to format it and check whether the syntax is valid before using it in an API, config file, or test.
Can I minify JSON online?
Yes. Use the compact or minify option to remove unnecessary spacing after you confirm the data is correct.
Is JSON Formatter free, and does it work on mobile?
Yes. JSON Formatter is free to use on JustBloc with no account or installation, and the page is designed to work on desktop, tablet, and mobile browsers.