Convert MP4 to OGG
Video audio re-encoded into the open standard — Opus in an OGG container, made on your own device.
Drop your video or audio here
or
MP4, MOV, WebM, MKV, AVI, MP3, WAV and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
OGG is the open-format home for audio: browsers play it natively, open-source tools treat it as a first-class citizen, and no patent licensing strings come attached. When a soundtrack, voice line, or recording starts life inside an MP4, this conversion moves it into that world in one step.
The tool decodes the MP4's audio track and re-encodes it with Opus — the best lossy audio codec in current existence — inside an OGG container, entirely in your browser. Quality at the settings used here is transparent for music and voice alike, and the source video never uploads anywhere.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Convert
Compatible files are repackaged instantly with zero quality loss; others are hardware-transcoded at high quality.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
What codec ends up inside the OGG file?
Opus, at a high bitrate. It is the modern open codec — better than MP3 and Vorbis at every bitrate — and browsers, VLC, and current audio tools play OGG Opus natively.
Will every app that says "OGG" accept this file?
Most modern ones, yes. Some older software — including certain game engines — expects the older Vorbis codec when it sees .ogg and may refuse Opus, so test your target tool first if it is picky.
Why choose OGG over MP3 for the extracted audio?
Better quality per megabyte and a fully open format: Opus outperforms MP3 clearly at the same size. Choose MP3 only when the file must play on old hardware that never learned newer formats.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.