CSV converter — everything local

Pick a conversion below. Every tool runs 100% inside your browser — files never leave your device.

CSV conversions

CSV → XLSX — free, private, batch supported

Why local conversion matters

Typical online converters upload your files to a server, convert them there, and send them back. ConvertFlow ships every codec (JPEG, PNG, WebP, HEIC, PDF, MP3 and more) as WebAssembly and converts files in your machine's memory instead. Nothing is uploaded, stored, or logged.

More local-first tools

StatementFlow — Bank statement → CSV/Excel, parsed locally in your browser
GeoFlow — Address → county, district & timezone enrichment