JSON Formatter — Beautify, Minify & Convert
A full-featured JSON workspace: beautify and validate JSON in seconds, minify it for production, or convert it to XML, CSV, or YAML — all in a side-by-side editor that runs entirely in your browser. No file upload to any server. No account required.
JSON Formatter Workspace
Validate, beautify, minify, and convert JSON right in the browser.
Included JSON Tools
Beautify & Format
Pretty-print JSON with 2, 3, 4 spaces or tab indentation.
Minify / Compact
Strip all whitespace to produce compact, transfer-ready JSON.
Validate JSON
Parse-time validation with inline error showing exact line number and column.
Convert to XML
Transform JSON to well-formed XML with automatic root element wrapping.
Convert to CSV
Flatten JSON arrays to CSV with dot-notation for nested keys.
Convert to YAML
Convert JSON to YAML format suitable for config files and CI pipelines.
How to Use the JSON Formatter
Paste or upload JSON
Drop your JSON into the left panel or click the file upload button to load a .json file.
Choose an action
Click Format to beautify, Minify to compact, or select a Convert target — XML, CSV, or YAML.
Review & validate
The status bar shows parse status, error location, root type, and character counts so you can fix issues instantly.
Copy or download
Copy the result from the output panel or download it in the matching file format (.json, .xml, .csv, .yaml).
Frequently Asked Questions
- Can I convert JSON to XML, CSV, and YAML?
- Yes. ToolMint's JSON Formatter includes a one-click converter for all three formats. Switch between conversions without re-pasting your JSON.
- What happens when JSON has a syntax error?
- The tool shows a red error badge with the exact line number and column of the first parse failure, so you can locate and fix the problem fast.
- Can I upload a JSON file instead of pasting?
- Yes. Click the upload button to load any .json file directly into the input panel. The tool processes it entirely in your browser.
- Does this tool work with large JSON files?
- Yes. All processing runs client-side using the browser's native JSON.parse and stringify APIs, so performance scales with your device.
- What indentation options are available?
- You can choose 2 spaces, 3 spaces, 4 spaces, or tab indentation before formatting.