JSON Formatter & Beautifier - Format and Validate JSON Online
Format and validate JSON with customizable indentation — 2 spaces, 4 spaces, or tabs
Developer Tools
JSON Formatter & Beautifier - Format and Validate JSON Online
How to Use
1Paste your JSON into the input area
2Choose your preferred indentation (2 spaces, 4 spaces, or tab)
3The formatted JSON appears instantly in the output
4Copy the result with one click
Frequently Asked Questions
JSON Formatter parses your JSON text and re-serializes it with consistent indentation, making it human-readable. It also validates the JSON and reports any syntax errors.
Common JSON errors include missing or extra commas, unquoted keys, single quotes instead of double quotes, and trailing commas. The error message will point you to the specific location of the problem.
2 spaces is the most common choice for web projects (used by Prettier by default). 4 spaces is popular in Python and Java. Tabs allow each developer to set their own visual width.
Yes. All processing happens entirely in your browser — your data is never sent to any server.