Y4M to OGG Converter
Processing entirely on your device — large files may take a moment.
Ogg is the standard choice for open-source software, game engines and free platforms. If your files are still in Y4M format, this page is the shortcut: Y4M is uncompressed video with a text header — the interchange format of video-filter pipelines (avisynth/vapoursynth) and encoder test suites.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How Y4M compares to OGG
| Y4M | OGG | |
|---|---|---|
| Compatibility | ffmpeg, x264, vapoursynth | Players yes, devices mixed |
| Best for | Filter-pipeline interchange | Games and open-source audio |
How to convert Y4M to OGG
- 1
Select your files
Select your Y4M video.
- 2
Convert instantly
The engine demuxes the container and encodes the audio track into your chosen format.
- 3
Download results
Download the OGG audio — the video track is simply dropped.
About the Y4M format
Y4M (YUV4MPEG2) is uncompressed video with a one-line text header: resolution, framerate and color space, then raw YUV frames. It is the lingua franca of video-filter pipelines — AviSynth, Vapoursynth and encoder test suites pass frames around as Y4M because there is nothing to misparse.
A Y4M of any real length is enormous (30MB per second of 1080p), so conversion to MP4/WEBM with H.264 or VP9 is always the destination — the value is in the zero-ambiguity input, not the format itself.
+ Strengths
- ✓Zero-ambiguity pixel format declaration
- ✓Standard between filter frameworks
- ✓Lossless by construction
! Limitations
- −No compression whatsoever
- −Color space variants (limited/full) trip decoders
- −Not natively playable in browsers
About the OGG format
OGG usually means the Ogg container carrying Vorbis audio — the open-source answer to MP3 from 2000. Vorbis delivered better quality than MP3 at the same bitrate and cost nothing to license, so it spread through game engines (Valve titles), open-source apps and streaming startups. It is technically a container format, so OGG files can also hold Opus or FLAC.
Hardware support was always its ceiling: phones and car systems were slow to add Vorbis, and Opus (also Ogg-based) has since surpassed it technically. Today OGG/Vorbis is best understood as a game-audio and open-ecosystem format.
+ Strengths
- ✓Royalty-free with good quality-per-bit
- ✓Native in game engines and open-source stacks
- ✓Container flexibility (Vorbis/Opus/FLAC)
! Limitations
- −Patchy hardware and car support
- −Technically surpassed by Opus
Why convert Y4M to OGG?
Converting makes sense where the strengths of OGG meet what Y4M cannot give you. Royalty-free with good quality-per-bit Meanwhile No compression whatsoever One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this Y4M to OGG converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for Y4M to OGG?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Does converting Y4M to OGG re-encode my video?
Yes. The video is decoded and re-encoded with the settings chosen by the quality slider, which is what allows the format and size to change. For an archival copy, keep higher quality; for sharing, lower quality gives a much smaller file.
Will the audio track be kept?
Yes. The audio is carried over and re-encoded to the standard audio codec of OGG, staying in sync with the video. If your Y4M file has multiple audio tracks, the first one is used.