Resize WebM Videos To Fit Your Screen
Resize WebM files online with no app install. Crop videos or turn landscape clips into vertical portrait videos right in your browser, with no upload, no waiting lines, and no file size limits. Change video dimensions instantly to make your clips fit perfectly on any screen.
Over 1 million creators use Flixier every day including brands like:
Change Video Dimensions And Edit Files Instantly
Crop Videos Safely
Your videos never leave your computer while you work on them. Enjoy a fast online video resizer that handles everything locally in your browser, helping you work around slow internet speeds and keeping files private.
Cut Out Black Bars
Make your wide screen recordings look completely natural on mobile devices. Use our simple tools to resize MP4 uploads or change the shape of your WebM clips to focus directly on the action without losing sharpness.
Fit Social Feeds
Switch video layouts to match your favorite platform’s requirements in just a few clicks. Use our tool to change the framing or compress WebM quickly to ensure your vertical or square videos can be shared anywhere.
Polish Your Videos
Click Edit in Flixier to access advanced creative tools after you finish resizing your video. Open our main editor to convert WebM to MP4 or edit WebM online to cut out mistakes, add background audio, or generate subtitles.
How to resize WebM files?
Who this is for
Marketers
Tweak file dimensions instantly to match the exact size required by Facebook ads, banners, or emails. Fix video dimensions on the spot, from any device, without installing any software.
See How It WorksEducators
Business Owners
Social Creators
Still have questions?
We got you!
How do I resize a WebM file for free?
To resize a WebM file for free, just open Flixier in your browser and drop your file into the tool. Choose your canvas aspect ratio or crop the video frame to your liking, let the tool process the changes, and save the video to your device.
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 dimensions instantly without any compatibility errors.
Can I change the aspect ratio of a WebM?
Yes. Our tool lets you change video dimensions in just a few clicks. You can choose between 9:16, 1:1, 16:9, and 4:5 aspect ratios so your clips fit perfectly on phone screens or social media feeds.
Is my WebM uploaded to a server?
No, your files never leave your computer while you resize it. Everything is processed locally in your browser. Your video only uploads to our cloud servers if you choose to click continue and open it in our full editor.
Can I convert WebM to MP4 instead of resizing?
You can use our video converter to change your video to MP4. Opening a WebM video with the Flixier editor will also convert it to MP4 automatically once you click Export and save it to your computer.
