AV1 to Y4M converter
A free AV1 to Y4M converter for AOMedia Video 1 files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your AV1 files here
or browse your device · paste with Ctrl+V
Accepts .av1, .ivf files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your AV1 files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
Y4M is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your Y4M
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
AV1
AOMedia Video 1The royalty-free codec backed by Google, Netflix, Amazon and Mozilla, beating HEVC on efficiency at the cost of far slower encoding. Now hardware-decoded on recent phones and GPUs.
- Developed by
- Alliance for Open Media
- Released
- 2018
- Extension
- .av1, .ivf
- MIME type
- video/mp4
- Compression
- Lossy
- Specification
- Open
Y4M
YUV4MPEG2Completely uncompressed raw frames behind a tiny text header. Used for codec testing and lossless intermediates; the files are enormous.
- Extension
- .y4m
- MIME type
- video/x-yuv4mpeg2
- Compression
- Uncompressed
- Specification
- Open
- AV1 is lossy and Y4M is lossless. Re-saving cannot recover details removed by the lossy source. The output is usually larger with similar visible quality, not a repaired original.
Questions about converting AV1 to Y4M
Is this AV1 to Y4M converter free?
Yes. Converting AV1 to Y4M here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my AV1 file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by ffmpeg in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for AV1 to Y4M?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting AV1 to Y4M lose quality?
Nothing is intentionally discarded in this step, because Y4M is lossless. A AV1 file encoded with lossy settings stays lossy, so missing detail is not recovered.
Can I convert several AV1 files to Y4M at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does AV1 to Y4M work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to Y4M
21 formats can become Y4M here.
Convert AV1 to other formats
A AV1 file can become any of these.