JSON Formatter
Paste or upload JSON to instantly format, validate, and minify it. Spot syntax errors with line-level feedback, switch between pretty and compact views, and copy the result in one click.
Features
- Syntax validation with line-level errors
- Pretty-print and minified output modes
- Copy or download formatted result
- Drag-and-drop file upload
Frequently Asked Questions
- How do I format JSON online?
- Paste your JSON into the editor, and it will be formatted automatically. You can switch between pretty-print and minified output modes.
- Does this tool validate JSON?
- Yes. Invalid JSON is flagged with a line-level error message so you can fix syntax issues quickly.
- Is there a size limit?
- The formatter handles files up to several megabytes in the browser with no server upload required.