Developer Tools
JSON Formatter
Paste JSON into the editor, format it instantly, and copy or download the cleaned output. This page is useful for APIs, config files, logs, and debugging structured data.
Format JSON Online
Format JSON online with readable indentation, copy, download, and sample input support.
Why Use This JSON Formatter
- Make markup and structured text easier to read
- Copy cleaned output for debugging and editing
- Use sample input for quick testing
- Download the formatted output as a file
Related Developer Tools
Related Guides
Common Situations Where This Helps
- An API response is hard to read in one line.
- Copied JSON from logs or a browser console is messy.
- You need to inspect nested objects before debugging.
- A request body needs to be cleaned up before reuse.
Which Tool Should You Choose?
JSON Formatter: Choose JSON Formatter when the JSON is valid and you want clean indentation.
JSON Validator: Choose JSON Validator when you first need to check whether the JSON is broken.
Common Problems and Fixes
The JSON is all in one line.
Format it first to make the structure readable and easier to inspect.
I cannot see where the nesting starts and ends.
Formatting makes arrays and objects much easier to follow visually.
The tool says there is an error.
Run the content through the JSON validator first to check for syntax issues.
Frequently Asked Questions
How do I format JSON?
Paste your JSON into the input box, run the formatter, and copy or download the formatted JSON output.
Does the JSON formatter validate syntax?
Yes. Invalid JSON is rejected and the page shows an error instead of malformed output.
Is this JSON formatter free?
Yes. It is free to use in your browser.