WEBM to AVI Converter
Need to convert this file type? Drop it below — or drop any other file and we'll auto-switch. Outputs are auto-deleted after 2 hours; share links expire after 4.
Or paste a link to a file
Drop multiple images to combine them into one PDF, Word document, or PowerPoint presentation — or convert each image separately.
Drop
Drag your WEBM file or click to browse.
Convert
AVI is preselected, or pick a different format below.
Download
Get your file or share a 1-hour link.
Convert WEBM to AVI online
Use this WEBM to AVI converter to turn WEBM files into AVI right in your browser — ideal for legacy Windows video and older recordings.
When should you convert WEBM to AVI?
- To reduce file size and make uploading and sharing easier
- When you need it for legacy Windows video
- When you need it for older recordings
- To open your files in apps that prefer AVI
What happens to your file
WEBM to AVI is a full re-encode, not a container swap: the video is decoded and re-compressed with MPEG-4 Part 2 at qscale 5, and the audio is re-encoded to MP3 (libmp3lame) at VBR quality 4. AVI is written with the older MPEG-4 Part 2 codec rather than H.264, because that is what legacy AVI players and editors actually decode. It is a weaker codec: at matching quality the file is usually larger than the H.264 original.
Settings this conversion runs with
| Engine | ffmpeg |
|---|---|
| Video codec | MPEG-4 Part 2 |
| Video quality | qscale 5 |
| Audio codec | MP3 (libmp3lame) |
| Audio bitrate | VBR quality 4 |
What changes
- The WEBM picture is decoded and re-compressed with MPEG-4 Part 2, so this is a generation loss: the output is built from an already-compressed source, not from the original camera data. Converting WEBM to AVI and back will soften the clip a little more each time.
- Only one video and one audio stream reach the AVI file. Additional audio languages, embedded subtitle tracks, and chapter markers are not carried across.
About WEBM and AVI files
WebM video
Strengths
- small for the web
- open and royalty-free
Limitations
- limited support in some apps
- less common offline
AVI video
Strengths
- widely recognized
- simple container
Limitations
- large files
- dated format
WEBM vs AVI
| Format | WEBM | AVI |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | — | — |
| Best for | web video, open-source playback | legacy Windows video, older recordings |
Related tools
Frequently asked questions
- Does converting WEBM to AVI re-encode the file?
- WEBM to AVI is a full re-encode, not a container swap: the video is decoded and re-compressed with MPEG-4 Part 2 at qscale 5, and the audio is re-encoded to MP3 (libmp3lame) at VBR quality 4. AVI is written with the older MPEG-4 Part 2 codec rather than H.264, because that is what legacy AVI players and editors actually decode. It is a weaker codec: at matching quality the file is usually larger than the H.264 original.
- What should you know before converting WEBM to AVI?
- The WEBM picture is decoded and re-compressed with MPEG-4 Part 2, so this is a generation loss: the output is built from an already-compressed source, not from the original camera data. Converting WEBM to AVI and back will soften the clip a little more each time.
- Is this WEBM to AVI converter free?
- Yes. You can convert WEBM to AVI online for free, with no account and no watermark.
- Do I need to install software or sign up?
- No. Use the converter from your browser without installing software or creating an account. Files are uploaded to our servers for processing.
- Will converting WEBM to AVI reduce quality?
- AVI uses lossy compression, so the file can get smaller while some visual quality may change.
- Are my files safe?
- Yes. Files are processed only to complete the conversion and are auto-deleted after 2 hours. We never share them.