Muffin / Data Converter
Muffin's Data Converter
Convert CSV, JSON, JSONL, and Excel files instantly — entirely in your browser. Nothing is uploaded anywhere.
Input
📂
Drop file or click to browse
CSV · JSON · JSONL · XLSX
Output
Output appears here after conversion…
// quick conversions — click to set
⇄ CSV → JSON
⇄ JSON → CSV
⇄ CSV → JSONL
⇄ JSONL → CSV
⇄ Excel → CSV
⇄ CSV → Excel
⇄ JSON → JSONL
⇄ JSONL → JSON