What is WebM used for?

WebM is commonly used for: web delivery, background videos, high compression.

How do I optimize WebM files?

Run "npx optimo video.webm" in your terminal. Optimo applies format-specific compression to reduce WebM file size while preserving quality.

What is WebM?

WebM (container) (.webm). Web-first video format that often compresses well and is common for modern browsers.

Last updated: 2026-03-18

WebM (WebM (container), .webm) is a video container format that uses container compression. Web-first video format that often compresses well and is common for modern browsers. It supports animation. Common uses include web delivery, background videos, high compression.

Quick facts

Extension

.webm

Type

Video container

Compression

container

Transparency

Animation

Yes

MIME type

video/webm

Common uses

web delivery
background videos
high compression

Delivery notes

Great for web-first delivery and silent loops.
Keep MP4 fallback if you need maximum reach.

What to do with optimo

Optimize WebM Compress WebM Resize WebM Convert between formats

npx optimo video.webm

Related conversions

Convert GIF to WebM Convert MP4 to WebM Convert MOV to WebM Convert MKV to WebM Convert AVI to WebM Convert WebM to MP4 Convert WebM to MOV Convert WebM to MKV Convert OGV to WebM Convert WebM to OGV

Frequently asked questions

What is WebM?: WebM (container) (.webm) is a video format. Web-first video format that often compresses well and is common for modern browsers. It uses container compression and animation.
What is WebM used for?: WebM is commonly used for: web delivery, background videos, high compression.
How do I optimize WebM files?: Run "npx optimo video.webm" in your terminal. Optimo applies format-specific compression to reduce WebM file size while preserving quality.