All conversions · On-device · No upload

Convert anything

Every format pair Transcodr can handle, converted free and entirely in your browser. Pick a conversion to get a tool pre-set for it.

Most popular

Video (30)

Audio (30)

Image (16)

Subtitles (2)

01 / Engine

Real ffmpeg, compiled to WebAssembly.

Same library Netflix, YouTube, and basically every command-line video tool relies on, running in a Web Worker. Pipe a file in, run a command, pipe bytes back out.

02 / Privacy

Nothing leaves the tab.

No uploads, no accounts, no telemetry beyond an anonymous pageview. We couldn’t see your files if we wanted to — there’s no server in the loop.

03 / Limits

It is, after all, a tab.

Files up to a few hundred megabytes convert comfortably. Beyond that, your browser starts asking pointed questions. Use the desktop ffmpeg for 4K masters.

© 2026 Transcodr · a privacy-first utility