AllEasyToolsVideo & Media
Change video aspect ratio
Fit video into 1:1, 4:3, 16:9 or 9:16 without stretching it. No account required. Processing stays in your browser.
No uploads. Up to 100 MB total, 5 minutes and 1920 × 1080 pixels (portrait also supported). Start with short clips on mobile.
How to use this tool
- Choose a local file and review its information and preview.
- Adjust the settings and generate the file. Canceling releases the processing engine.
- Play or open the result before downloading and sharing.
Example and limitations
For a square post, choose 1:1. Cropping removes edges; padding keeps the whole image with black bars. The anchor controls which area to retain.
Actual compatibility
MP4, MOV, WebM or MKV input: reading depends on the codecs inside and your browser. AVI, protected files and external URLs are not supported. Editing requires WebCodecs and OffscreenCanvas. Tested in Chromium on Windows; Safari, Firefox and mobile require verification on your device. Each operation has a 3-minute execution limit.
Output may lose quality or increase in size. Platform acceptance is not guaranteed; check current platform requirements.
Media engine licenses