Paste your JSON
Enter or paste a JSON object, array or other valid JSON value into the input area.
Free Browser Developer Tool
📄 JSON Formatter & Validator
Format, validate, minify and copy JSON data directly inside your browser.
Formatted JSON appears here...
How it works
Format JSON in three simple steps
Paste valid JSON into the editor and use ToolNoova to make it easier to read, verify or compress.
Choose an action
Format the data for readability or minify it to remove unnecessary spaces and line breaks.
Review and copy
Check the output, correct any reported syntax problems and copy the final result when ready.
JSON features
Useful controls for developers and data work
Clean up JSON before debugging, sharing, documenting or using it inside an application.
Readable formatting
Add indentation and line breaks so nested objects and arrays are easier to inspect.
JSON validation
Detect invalid JSON when the browser cannot parse the supplied data.
JSON minification
Remove unnecessary whitespace to create a compact representation.
Copy output
Copy the formatted or minified result for use in code, documentation or testing.
Local file input
Open a JSON file of up to 5 MB directly through the browser without uploading it to ToolNoova.
Downloadable output
Save valid formatted or minified output as a new .json file.
Indentation control
Choose two spaces, four spaces or tabs for readable output that fits your project style.
Recursive key sorting
Optionally sort object keys at every nested level while preserving array order.
Output statistics
Compare character, line and UTF-8 byte counts after formatting or minification.
Common uses
Work with JSON more efficiently
JSON is widely used in APIs, configuration files, web applications and data exchange.
- Format API responses for easier inspection
- Validate configuration data before saving it
- Minify JSON before transferring or embedding it
- Debug missing commas, quotation marks or brackets
- Prepare readable examples for documentation
- Review nested objects and arrays
- Clean data copied from logs or developer tools
- Compare readable and compact JSON structures
JSON example
Formatted and minified JSON
Unformatted JSON
{"name":"ToolNoova","tools":10,"active":true}
Formatted JSON
{
"name": "ToolNoova",
"tools": 10,
"active": true
}
Minified JSON
{"name":"ToolNoova","tools":10,"active":true}
Frequently asked questions
JSON Formatter FAQ
Is the ToolNoova JSON Formatter free?
Yes. The current formatter is free to use and does not require registration.
What is JSON formatting?
Formatting adds indentation and line breaks to valid JSON so its structure is easier for people to read.
What does JSON minification do?
Minification removes unnecessary whitespace while preserving the underlying JSON data.
Why is my JSON invalid?
Common causes include missing commas, single quotation marks, unquoted property names, trailing commas or mismatched brackets.
Can JSON contain comments?
Standard JSON does not support comments. A file containing comments may fail validation unless the comments are removed or a different data format is used.
Does formatting change the data?
Formatting should only change whitespace and presentation. The underlying property names, values and structure remain the same.
Does ToolNoova store my JSON?
The current formatter is designed to process your input in the browser and does not require a ToolNoova account.
Should I paste API keys or passwords into the formatter?
No. Keep credentials and other sensitive production data out of online tools unless you have independently confirmed the processing and security arrangements are appropriate.