Convert AVI to WEBM

AVI to WEBM converter that runs entirely in your browser. 100% free, no signup, no upload — your files never leave your device. One-click batch conversion.

Conversions

Drop any file here or click to browse

All file types supported

About formats

AVI

AVI (Audio Video Interleave) is one of the oldest and most recognized multimedia container formats, introduced by Microsoft in November 1992 as part of its Video for Windows technology. Built on the Resource Interchange File Format (RIFF) structure, AVI interleaves audio and video data in alternating chunks, allowing synchronized playback without requiring sophisticated stream management. The format is codec-agnostic, meaning it can hold video compressed with virtually any codec, from early Cinepak and Indeo to modern DivX, Xvid, and H.264 streams. This flexibility contributed to widespread adoption across personal computers throughout the 1990s and 2000s. AVI supports multiple audio streams, enabling multilingual content within a single file. Despite being decades old, AVI remains one of the most universally recognized multimedia formats and is still widely supported by media players and editing tools across all major operating systems.

Developer: Microsoft
Initial release: November 10, 1992
Compression: Lossy
Color depth: up to 10-bit
Transparency: No
Animation: Yes

Best for

Archiving legacy video footage
Editing in older video software
Storing multiple audio tracks
Playback on classic media players
Cross-codec video container use

Pros

+Codec-agnostic — accepts nearly any video codec
+Supports multiple audio streams for multilingual content
+Universally recognized by media players and editors
+Simple RIFF chunk structure easy to parse

Cons

−No modern streaming or chapter metadata support
−Files tend to be large with inefficient codecs
−No built-in subtitle standard
−Lacks DRM and modern container features

WEBM

WEBM is an open, royalty-free multimedia container designed for the web, sponsored by Google. It is based on the Matroska profile and pairs the VP8/VP9 or AV1 video codecs with the Opus or Vorbis audio codecs. WEBM is built for HTML5 video playback and is supported natively by Chrome, Firefox, Edge and most modern browsers.

Developer: Google
Initial release: 2010
Compression: Lossy
Color depth: up to 12-bit HDR
Transparency: No
Animation: Yes

Best for

Embedding video in HTML5 pages
Web-native video streaming
Royalty-free video delivery
Browser-based video playback
Open-source video projects

Pros

+Royalty-free and open format
+Native HTML5 playback in modern browsers
+Pairs VP8/VP9/AV1 with Opus/Vorbis
+Efficient compression for web delivery

Cons

−Limited support in Safari historically
−Fewer hardware decoders than H.264
−Less common in professional editing tools

How to convert AVI to WEBM

1
Select AVI files from your computer, Google Drive, Dropbox, a URL, or by dragging them onto the page.
2
Choose webm — or any other format you need as a result (more than 200 formats supported).
3
Let the file convert, then download your webm file right away.

AVI vs WEBM

Property	AVI	WEBM
Compression	Lossy	Lossy
Color depth	up to 10-bit	up to 12-bit HDR
Multi-track	Yes	Yes
DRM support	No	No
Open format	No	Yes

When to use AVI vs WEBM

AVI

Archiving legacy video footage
Editing in older video software
Storing multiple audio tracks
Playback on classic media players
Cross-codec video container use

WEBM

Embedding video in HTML5 pages
Web-native video streaming
Royalty-free video delivery
Browser-based video playback
Open-source video projects

Use cases for AVI → WEBM

Archiving legacy video footage
Editing in older video software
Storing multiple audio tracks
Playback on classic media players
Cross-codec video container use
Embedding video in HTML5 pages
Web-native video streaming
Royalty-free video delivery
Browser-based video playback
Open-source video projects

Frequently Asked Questions

Is converting AVI to WEBM free?

Yes. This AVI → WEBM converter runs entirely in your browser and is completely free — no account, no credits, no watermark.

Which devices and platforms can I use to convert AVI to WEBM?

Any modern device with a current web browser: Windows, macOS, Linux, Android, iPhone and iPad. There is nothing to install — the conversion happens locally.

Are my AVI files uploaded to a server?

No. Files never leave your device. The entire AVI → WEBM conversion runs locally in your browser, so your data stays private.

Can I convert multiple AVI files at once?

Yes — batch conversion is supported. Add as many AVI files as you like and convert them to WEBM in one pass, then download the results together.

What is the maximum file size?

There is no fixed server-side limit because the conversion happens in your browser. Practical limits depend on the available memory and CPU of your device.

Will converting AVI to WEBM reduce the quality?

Because both formats use lossy compression, the WEBM output will not bring back any quality that has already been lost in your AVI file. Avoid repeated re-encoding to keep the best quality.

Does WEBM support transparency?

No — WEBM has no alpha channel. Transparent areas of your AVI file will be filled with a solid background colour in the converted file.

How will the file size change after converting AVI to WEBM?

Both formats use comparable compression, so the WEBM output will be similar in size to your AVI file — typically within 10–20% of each other.

Related Conversions

Specific converters

FREE

100% Free

No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.

SIGNUP

No Signup Required

Start converting immediately without creating an account or sharing email address.

PRIVACY

Private & Secure

Your files never leave your device. All processing is completed locally for maximum privacy.

BATCH

Batch Conversion

Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.

LOCAL

Runs in Browser

Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.

FORMATS

200+ Formats

Supports a wide variety of formats including images, documents, audio, video, and more.

USER REVIEWS

Convert AVI to WEBM Quality Rating

4.8

25 reviews

How was your experience? You need to convert and download at least one file to provide feedback!