WEBM to AVI Converter

Turn a web WEBM into an AVI that older Windows players and legacy editors can open. Free, in your browser, no signup.

Select WEBM file →

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Click or drag and drop to upload files

We support most file types including: MP4, MOV, WEBM, AVI, MP3, WAV, PNG, JPEG, GIF, MKV, PDF, FLAC, TIFF!

EchoWave is used by creators, marketers, educators, and businesses to convert and edit media online.

Updated June 2026

WEBM is a modern web container, but a lot of older software was retired long before it existed. Vintage Windows players, legacy editing suites, and DVD authoring tools often understand AVI and nothing newer. Converting bridges that gap. EchoWave re-encodes your WEBM into an AVI file those older tools can open, free and right in your browser with no signup.

Free, no sign-upNo account, no trial

Runs in your browserNothing to install

Works on every devicePhone, tablet, laptop

No watermarkClean output, every time

How it works

How to convert WebM to AVI

1
Upload your WebM
Drag your WebM onto the converter or pick it from your device. Nothing to install.
2
Choose AVI and convert
Select AVI as the output and start. Free, with no sign-up and no watermark.
3
Download your AVI
Save the finished AVI, or open it in the editor to trim, crop, or resize it first.

Try it

Estimate your AVI

Pick a video bitrate and a length to see the AVI file size before you convert.

Video bitrate

Length5 min

1 min30 min

Estimated AVI size183MBSharp 1080p

An estimate. Real size varies with resolution, frame rate, and how much the picture moves.

The formats

WebM vs AVI

WebM

Open video built for the web

Type: Open web video container
Holds: VP8 or VP9 video with Vorbis or Opus audio
Typical size: Small at good quality
Plays on: Chrome, Firefox, Edge, and Android

Best for:Video embedded on web pages

AVI

Audio Video Interleave

A legacy Microsoft video container

Type: Legacy video container
Holds: Older codecs like DivX or Xvid with MP3 or PCM audio
Typical size: Large for the quality it gives
Plays on: Windows and VLC, patchy on phones

Best for:Playing older Windows video files

Will it lose quality?

When the codecs already match AVI, the converter can change the container without re-encoding, so the picture stays identical.
When the video has to be re-encoded for AVI, a high bitrate keeps it visually close to the WebM.
Converting cannot add detail the WebM never had. The output is at best as good as the source.

Use cases

What people use it for

Play anywhereMake a clip your device supports

Video editorsGet footage your software accepts

Web videoUse a format browsers play

CourseworkHand in a standard video file

SharingSend a clip people can open

Troubleshooting

If something looks off

The AVI will not play

Some players are picky about codecs. Try it in VLC, which opens almost anything, or convert again and let the converter re-encode the video.

The file got larger

A format change can shift the size, and re-encoding at a high bitrate adds overhead. Lower the bitrate or trim the clip for a smaller file.

Audio and video drift out of sync

Re-download the source and convert again. If a long recording drifts, splitting it into shorter pieces usually fixes the sync.

FAQ

WebM to AVI questions

Why would I convert WEBM to AVI instead of MP4?

AVI is the format older Windows software was built around: legacy video editors, DVD authoring tools, and some smart TVs and car stereos read AVI but not WEBM. If your target is modern phones or the web, MP4 is the better pick, but AVI is the right choice for older hardware and software.

How do I convert WEBM to AVI?

Upload your WEBM, choose AVI as the output, and start the conversion. When it finishes, download the AVI or open it in the editor to trim or crop it first. No account and no software install are required.

Will WEBM to AVI play in Windows Media Player and VLC?

Yes. AVI is one of the most widely supported containers on Windows, so the converted file opens in Windows Media Player, VLC, KMPlayer, and almost any older desktop player without extra codecs.

Will converting WEBM to AVI reduce the quality?

WEBM and AVI use different codecs, so the video is re-encoded rather than just rewrapped. A high bitrate keeps the AVI visually close to the source, and converting can never add detail the WEBM never had, so the result is at best as good as the original.

Why is the AVI so much larger than my WEBM?

WEBM uses VP9, a very efficient modern codec, while AVI typically holds older codecs that need more data for the same quality, so the file usually grows. Lower the bitrate in the estimator above or trim the clip to keep the AVI smaller.

Does the WEBM to AVI converter work on Mac and Windows?

Yes. It runs in any browser, so you can convert WEBM to AVI on Windows, macOS, Chromebook, and Linux. There is nothing to download and no account to create.

Is the WEBM to AVI converter free?

Yes. EchoWave converts WEBM to AVI with no signup, no file-count limit, no trial, and no watermark. Upload your video, convert it, and download the AVI from your browser.

The AVI will not play on my phone, why?

AVI is a legacy Windows container and phones often skip it. AVI makes sense for older desktop software and hardware, but if you need the clip on a phone, convert your WEBM to MP4 instead.