Convert AVI to WEBM online in seconds — free, with no sign-up. WEBM is lossy and ideal for efficient web video in Chrome, Firefox and Edge. Your files are encrypted and deleted automatically after 24 hours.
AVI
Audio Video Interleave — An older Microsoft container with large file sizes and limited modern support.
WEBM
WebM — A royalty-free web video format (VP8/VP9) that's smaller than H.264 at equal quality.
How to convert AVI to WEBM
- 1Upload your AVI file
Click “Choose a file” or drag and drop your AVI file onto the page — no sign-up or email needed.
- 2Convert to WEBM
WEBM is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your WEBM file
Your WEBM file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
AVI vs WEBM
| AVI | WEBM | |
|---|---|---|
| Full name | Audio Video Interleave | WebM |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Best for | legacy video; usually converted to MP4 or WebM | efficient web video in Chrome, Firefox and Edge |
Frequently asked questions
Does converting AVI to WEBM lose quality?
Both AVI and WEBM use compression, so re-encoding discards a little more data. For a single conversion the change is virtually invisible; just avoid repeatedly re-converting the same file.
What's the difference between AVI and WEBM?
Audio Video Interleave (AVI) is lossy and best for legacy video; usually converted to MP4 or WebM. WebM (WEBM) is lossy and best for efficient web video in Chrome, Firefox and Edge. Convert AVI to WEBM when you need a video for efficient web video in Chrome.
Is the AVI to WEBM converter free?
Yes — converting AVI to WEBM is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my AVI files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert AVI to WEBM on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert AVI to WEBM?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert AVI files to?
Besides WEBM, you can convert AVI to AAC, FLAC, FLV, GIF, JPG, M4A and more — see the full list of AVI conversions below.
Other conversions
Last updated July 2026