AVI to Y4M converter
A free AVI to Y4M converter for Audio Video Interleave files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your AVI files here
or browse your device · paste with Ctrl+V
Accepts .avi 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 AVI 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.
AVI
Audio Video InterleaveMicrosoft's 1992 container, still everywhere in old camera footage and legacy archives. It predates streaming and variable frame rate, so converting to MP4 usually both shrinks the file and fixes playback.
- Developed by
- Microsoft
- Released
- 1992
- Extension
- .avi
- MIME type
- video/x-msvideo
- Compression
- Lossy or lossless
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
- Y4M stores the incoming samples as provided, so this step does not add generic quality loss. If the source AVI was already lossy, those earlier losses remain.
Questions about converting AVI to Y4M
Is this AVI to Y4M converter free?
Yes. Converting AVI 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 AVI 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 AVI 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 AVI to Y4M lose quality?
No. Y4M stores its data losslessly, so everything in your AVI file is preserved exactly.
Can I convert several AVI 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 AVI 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 AVI to other formats
A AVI file can become any of these.
Y4M to AVI
The reverse conversion
AVI to MP4
AVI to MP3
AVI to WAV
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