AVIF to WebM Converter
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Supports: AVIF
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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Need help?How to Convert AVIF to WebM
- Upload your AVIF images — Click "+ Add Files" or drag and drop your AVIF files. Upload multiple images to create a video slideshow.
- Choose merge strategy — Under "Merge strategy," select "Merge images" to combine all uploads into a single WebM video, or "Video per image" to create a separate WebM for each file.
- Set image duration — Under "Image Duration," set how long each image displays in the video (in seconds).
- Set background color — Under "Background Color," choose a color for any letterboxing areas if your images don't match the output aspect ratio.
- Adjust resolution — Under "Video resolution," keep original, pick a preset (1080p, 720p, 480p, etc.), or enter exact width/height in pixels.
- Convert and download — Click "Convert" and download your WebM video.
Why Convert AVIF to WebM?
AVIF images offer exceptional compression quality, but sometimes you need to turn a set of still images into a video — for social media stories, product showcases, photo slideshows, or web animations. WebM is Google's open, royalty-free video format using VP9 or AV1 codecs, natively supported by Chrome, Firefox, Edge, and Opera without plugins.
Converting AVIF images to WebM creates lightweight video files ideal for embedding on websites. WebM's efficient compression keeps file sizes small while maintaining visual quality, and its native browser support means no Flash or special players are needed. This is particularly useful for creating auto-playing background videos, product image carousels, or animated banners from a series of AVIF stills.
WebM vs Other Video Formats for Web
| Feature | WebM (VP9) | MP4 (H.264) | GIF |
|---|---|---|---|
| File size | Small | Medium | Very large |
| Quality | Excellent | Excellent | 256 colors max |
| Audio support | Yes (Opus/Vorbis) | Yes (AAC) | No |
| Browser support | Chrome, Firefox, Edge, Opera | Universal | Universal |
| Autoplay on web | Yes | Yes | Yes |
| Royalty-free | Yes | No | Yes |
Frequently Asked Questions
Can I merge multiple AVIF images into one video?
Yes. Upload multiple AVIF files, select "Merge images" under "Merge strategy," and set the duration each image displays. The images play in upload order as a slideshow video.
What duration should I set per image?
For slideshows, 3–5 seconds per image works well. For fast-paced social media content, try 1–2 seconds. For product showcases where viewers need time to examine details, use 5–8 seconds.
Can I create a separate video for each image?
Yes. Select "Video per image" under "Merge strategy." Each uploaded AVIF becomes its own WebM file with the specified duration, useful for creating individual video thumbnails or animated previews.
What resolution should I use?
For web embedding, 1080p or 720p covers most use cases. For social media stories, 1080p in portrait orientation works best. Keep original resolution if your AVIF images are already sized correctly.
Is WebM supported on Safari/iOS?
Safari added WebM support in version 16 (2022). For maximum compatibility including older Safari versions, consider converting to MP4 instead.
What's the background color for?
When your images have a different aspect ratio than the output video resolution, the background color fills the letterbox/pillarbox areas. Black is the default and works well for most content.