I built a file converter that runs entirely in your browser — no uploads, ever

Every popular file converter - CloudConvert, Convertio, online-convert - uploads your files to their servers. Your photos, videos, documents sit on someone else's machine, even if briefly.

ZenConvert works differently:

• Images processed via HTML5 Canvas API

• Videos processed by FFmpeg compiled to WebAssembly - runs entirely in your browser tab

• Nothing touches a server. Ever.

What that means practically:

• Convert sensitive documents without worry

• Works offline once loaded

• 50+ image formats, 50+ video formats

• Batch conversions, DPI settings, EXIF stripping, video trimming

Advanced Mode unlocks formats most people have never heard of -NASA FITS, Amiga IFF, Kodak Cineon, PlayStation STR. Formats spanning 1981 to 2024.

Pro plan starts at $5/month for unlimited conversions and larger file sizes.

Would love feedback, especially from anyone who's worked with WASM or FFmpeg in the browser before.