JSON / CSV Formatter
Beautify, minify, validate JSON, and convert between JSON and CSV. All processing happens in your browser — instant and private.
Input (JSON)
Output (JSON)
Frequently asked questions
Is my data safe?+
Yes. All processing happens in your browser. Your data is never sent to any server — it stays on your device at all times.
What formats does this support?+
The tool handles JSON (objects, arrays, nested structures) and standard CSV with comma separators. It handles quoted fields, embedded commas, and numeric type detection.
Is there a size limit?+
There is no hard limit, but very large files (over 10 MB) may slow down your browser since all processing is done client-side. For large datasets, consider using a dedicated data pipeline.
Can I use this for API testing?+
Absolutely. Paste API responses to beautify and inspect them, or format request payloads before sending. The validate mode is especially useful for catching syntax errors in hand-written JSON.