How to convert AVI to WebM
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert AVI to WebM
NexMedia converts AVI to WebM on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About AVI
AVI (Audio Video Interleave) is a container format Microsoft introduced in 1992 for video on Windows.
Older cameras, Windows software and video collections from the 1990s and 2000s.
AVI predates modern codecs and has no native support for features such as variable frame rate, so it is rarely used for new video.
Convert AVI to WebM online free, no account required — WebM is an open, royalty-free web video format with VP8, VP9 or AV1 video and Opus or Vorbis audio.
Change AVI to WebM without losing quality — convert AVI to WebM free in your browser.
Why is my AVI file so much bigger than modern video? The container predates efficient codecs like H.264, so an hour of video can take many gigabytes that an MP4 would store in a fraction of the space.
About WebM
WebM is an open, royalty-free video format developed by Google and based on the Matroska container. It holds VP8, VP9 or AV1 video with Vorbis or Opus audio.
It is made for the web: all major browsers play it in the HTML video element, and it is common for screen recordings and short clips.
WebM allows only its own small set of codecs, so H.264 video or AAC audio has to be re-encoded to fit.
Why convert video to WebM for a website? Browsers play it without plugins, and VP9 or AV1 compresses smaller than H.264 at the same quality, so pages load faster.
What changes when you convert AVI to WebM
- The AVI is re-encoded into WebM at the default quality settings, so the result looks close to the original but is not bit-identical.
Settings you can change
Before you convert AVI to WebM, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted WebM file is kept for 2 hours, then deleted.
AVI to WebM: questions and answers
Does converting AVI to WebM reduce quality?
The AVI is re-encoded into WebM at the default quality settings, so the result looks close to the original but is not bit-identical.
What is the difference between AVI and WebM?
AVI is Microsoft's older Windows video container. WebM is an open, royalty-free web video format with VP8, VP9 or AV1 video and Opus or Vorbis audio.
Can I change the settings when converting AVI to WebM?
Before you convert AVI to WebM, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Do I need an account to convert AVI to WebM?
No. You can convert AVI to WebM without an account; signing in raises the file-size and daily limits.
How long is my converted WebM file kept?
The WebM file you convert from AVI is kept for 2 hours, then deleted automatically.
When I convert AVI to WebM, is the video re-encoded?
The AVI is re-encoded into WebM at the default quality settings, so the result looks close to the original but is not bit-identical.
Will converting AVI to WebM change my original file?
No. The conversion reads your AVI and writes a new WebM file, leaving your original AVI file untouched.