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Format, minify, validate JSON, and convert between JSON and CSV — all at native speed in your browser.
Working with structured data is a daily task for developers, data analysts, and business intelligence professionals. Whether you are debugging an API response, preparing a data import, or converting between formats, devmeldex's free JSON formatter and CSV converter provides instant, local processing. Format, minify, validate JSON, and convert bidirectionally between JSON and CSV — all at native browser speed with zero data leaving your device.
{"name":"John","age":30,"city":"London"}
{ "name": "John", "age": 30, "city": "London" }
The formatter takes compact, minified JSON and applies proper indentation for readability. Validation confirms the JSON is syntactically correct.
Select from Format JSON, Minify JSON, Validate JSON, JSON→CSV, or CSV→JSON using the mode buttons.
Enter your JSON or CSV data in the input panel on the left.
Click the "Process" button to execute the transformation. Results appear instantly in the output panel.
Use the "Copy Output" button to copy the processed data to your clipboard.
If your input is malformed, the tool displays a clear error message explaining what went wrong.
Format minified JSON API responses into readable, indented structures for quick debugging.
Convert JSON data to CSV for spreadsheet tools, or CSV exports back to JSON for database imports.
Validate JSON config files before deployment to catch syntax errors early.
Convert between formats to move data between NoSQL databases (JSON) and BI tools (CSV).