JSON Formatter

How to Use Paste your JSON text into the left input area and the formatted result appears automatically on the right. Choose between 2-space or 4-space indentation to match your team's coding style. If your JSON is invalid, an error message shows the exact line and column where the problem occurs. Use the copy button to grab the formatted result instantly. Who Is This For Developers who receive compressed API responses and need to read them, frontend and backend engineers reviewing JSON data structures, QA testers validating API payloads, and anyone who needs to share readable JSON with their team. Key Features • Automatic syntax highlighting for keys, values, strings, and numbers • Selectable indentation size (2 or 4 spaces) • Validation with error location display • One-click copy to clipboard • Minify (compress) option to remove whitespace Frequently Asked Questions Q: Does it support Unicode and non-ASCII characters like Korean or emoji? A: Yes, full UTF-8 support is included. All Unicode characters display correctly. Q: Can it handle large JSON files (several MB)? A: It handles files up to a few MB within browser memory limits. Files over 10MB may slow down formatting. Q: Does formatting change the data in any way? A: Only whitespace and line breaks are added. The data content is never modified. Tips Use 4-space indentation when sharing JSON as API documentation. Stick with 2-space for scripts and config files. When an error occurs, check the line and column number in the error message to pinpoint the issue quickly.