Makes JSON data readable (formats it), minifies it onto a single line, and validates its syntax. Everything runs in your browser.
What Is JSON?
JSON (JavaScript Object Notation) is a lightweight, human-readable format used for exchanging data. It has become the standard for API responses, configuration files, and data transfer. It consists of key-value pairs, arrays, and nested objects.
What Does This Tool Do?
- Format: Turns complex JSON into an indented, readable structure.
- Minify: Removes all unnecessary whitespace to condense it onto a single line.
- Validate: Detects syntax errors and reports whether the data is valid.
How to Use It
- Paste your JSON data into the left panel.
- Click the Format / Minify / Validate button for the operation you need.
- Copy the result.
Privacy: This tool runs entirely in your browser (client-side); your data is never sent to a server.
Frequently Asked Questions
Is my data sent to a server?
No. JSON Formatter runs entirely in your browser; the data you enter is never transmitted anywhere.
I'm getting an “Invalid JSON” error. Why?
This is usually caused by a missing quotation mark, a trailing comma, an unclosed bracket, or the use of single quotes. Check the position indicated in the error message.
