Resize WebM Online for Free
Change your WebM video’s size right in your browser for free without having to install any software. Your file never leaves your device, so there’s no upload queues either.
Over 1 million creators use Flixier every day including brands like:
How to Resize WebM Online
Change the Size of Your WebM Video in Your Browser
Fit Any Platform’s Layout
Resize your video to match any platform, whether that’s square for Instagram (1:1), vertical for TikTok (9:16), widescreen for YouTube (16:9), or portrait mode (4:5). You can also drag the crop handles for a customized look.
Keep Your Files Private
Your video is resized using your own device's processing power, not a server. No WebM file you want to resize is stored anywhere outside your browser tab, which means you can keep your personal videos secure.
No File Size Limits
Because you don’t actually upload anything to a server, file size isn't capped by any limits and slow Internet connections don't affect the speed your video is processed at. You can resize as big of a WebM file as you want.
No Hidden Cost
Our on-page WebM resizer tool is completely free to use. You don’t need to create an account with Flixier or upgrade to a paid subscription plan to resize your videos unless you want to access our full video editing suite.
Who This Is For
Marketers
Turn one video into the right size to tell the story you want. Find the right fit for your ads and promotional content.
See How It WorksEducators
Business Owners
Social Creators
Still have questions?
We got you!
How do I resize a WebM file for free?
Drop your video into Flixier's browser tool, choose a preset size or drag the crop handles for a custom one, then click Resize. The file downloads straight to your device, no account or install required.
Can I resize VP9 WebM video?
Yes. Our tool runs directly inside your web browser and fully supports both VP8 and VP9 WebM video types. You can drop these files onto your screen to adjust their framing and size instantly without any compatibility errors.
Can I change the aspect ratio of a WebM?
Yes. Choose a preset ratio like 1:1, 9:16, or 16:9, or drag the crop handles for a custom shape. This works for reformatting one video across multiple platforms.
Is my WebM uploaded to a server?
No. Resizing happens locally in your browser using your device's own processing power. Your file isn't sent to or stored on a server at any point.
Can I edit my WebM after resizing?
Not from this tool directly. To make further changes, save your resized file and open it separately in Flixier's full video editor.
