WebM Transparent Background Maker
Video that floats over any web page
Upload a video and download a VP9 WebM whose background is actually transparent, ready for a web page.
Video background remover
One free frame preview, no sign-in needed 2 credits per second of video No watermark on paid downloads See pricing
Previews are processed at up to 720p. Paid downloads keep the original frame size. Uploads are deleted after 24 hours, finished downloads after 7 days.
Try an example
How to make a transparent WebM
Choose Transparent WebM and the download is a VP9 video with an alpha channel, ready for a web page.
1Upload your clip
Click Upload video or drop an MP4, MOV or WebM up to 30 seconds and 100 MB.
2Choose subject and format
Pick People or Objects & pets and one of four downloads. The credit cost shows before you start.
3Download the result
About 5 minutes for a 30-second clip. You can leave the page while it runs.
Pick the file for where it is going
See it on a moving clip
The original clip and its cut-out play in sync under one divider. Drag it across, then compare the stills below.
AI-generated sample clip. The cut-out is real, unedited output from the People model.
Download this example (WebM with alpha)Still frames
Person
Video model output
Product
Video model output
Pet
Video model output
WebM transparent background in detail
See-through video for the web
A WebM can carry an alpha channel, so a cut-out clip can sit over any page background with nothing behind the subject. Chrome and Firefox show that transparency. Safari plays the same file without it, so plan a fallback.
Where a WebM transparent background keeps its transparency
Checked against each vendor document linked under the table.
Scroll the table sideways to see every column.
| Download | Transparency in the file | Chrome and Firefox | Safari | Final Cut Pro | DaVinci Resolve 20 | OBS Studio | Size, 30 s of 1080x1920 |
|---|---|---|---|---|---|---|---|
| Transparent WebM (VP9) | Yes | Plays with transparency | Plays VP9, without transparency | WebM is not in the import list | No WebM container in the list | .webm listed as a media file; alpha not checked | About 23 MB |
| ProRes 4444 MOV | Yes | Not checked | Not checked | Apple ProRes, all versions, listed | ProRes 4444 MOV listed | .mov listed as a media file; alpha not checked | About 975 MB |
Not checked means we found no vendor document for that cell, not that it fails. Premiere Pro, After Effects and CapCut are left out because we could not check them against Adobe or CapCut documentation.
Sources
- Chrome, Firefox and Safari: Jake Archibald, video with transparency on the web (2024)
- Final Cut Pro: Apple Support, Final Cut Pro import formats
- DaVinci Resolve 20: Blackmagic Design, DaVinci Resolve supported codec list, July 2025 (PDF)
- OBS Studio: OBS Studio knowledge base, Media Sources
Put a transparent WebM on a web page
Use an ordinary video element. The page background shows through wherever the file is transparent, so no extra CSS is needed for the see-through part.
<video autoplay muted loop playsinline width="540" height="960">
<source src="subject.webm" type="video/webm">
</video>The width and height reserve space while the file loads. Safari plays VP9 WebM without its transparency, and the HEVC with alpha that Safari needs is not something this tool exports. For Safari visitors, place the clip where a solid background still looks right, or show a still image instead.
Sources
- Chrome, Firefox and Safari: Jake Archibald, video with transparency on the web (2024)
How big a transparent WebM is
WebM is compressed for delivery and ProRes 4444 is built for editing. On the same clip the MOV was about 40 times larger.
- Transparent WebM
- About 23 MB
- VP9 video with an alpha channel
- ProRes 4444 MOV
- About 975 MB
- About 260 Mbit/s, alpha channel included
- Green screen MP4
- 12 to 15 MB
- H.264 video on #00FF00 green
- Wait for the 30-second clip
- About 5 minutes
- 272 s and 300 s in total, one run per subject mode
Measured on one 30-second 1080x1920 clip at 30 fps, September 2026. Your own clips will differ.
Using a transparent WebM in OBS
OBS Studio's own Media Sources page lists .webm among the video files a Media Source can play. We have not yet tested whether OBS keeps the alpha channel of our WebM, so check the overlay in a test scene before you go live. If a background shows, the same clip exported as ProRes 4444 MOV is the other file to try.
Sources
- OBS Studio: OBS Studio knowledge base, Media Sources
Frequently asked questions
Upload the MP4, choose People or Objects & pets, and leave the output on Transparent WebM, which this page selects for you. The model removes the background on every frame, and you download a VP9 WebM with an alpha channel at the frame size and frame rate of your MP4, with its sound kept. A 30-second clip takes about 5 minutes.
The player is not showing the alpha channel. Safari supports VP9 video but not VP9 with transparency, so a transparent WebM plays there with a solid background even though the transparency is in the file. Open the same file in Chrome or Firefox to check it. For an editor that will not import WebM, use ProRes 4444 MOV instead.
It plays, but without the transparency: Safari supports VP9, not VP9 with an alpha channel. Transparent video in Safari needs HEVC with alpha, which this tool does not export. For Safari visitors, design the page so the clip still looks right on a solid background, or show a still image in its place.
Add a video element with the autoplay, muted, loop and playsinline attributes, and point its source at the WebM with the type video/webm. The page background shows through the transparent pixels without any CSS. Give the element a width and height so space is reserved while it loads, and plan a fallback for Safari. The snippet on this page is ready to copy.
Not according to either vendor. Apple's Final Cut Pro import formats page does not list WebM, and Blackmagic's DaVinci Resolve 20 codec list has no WebM container. Both list ProRes 4444 MOV, so export that from the same upload instead. We have not checked Premiere Pro against Adobe documentation, so we make no claim about it here.
OBS Studio's Media Sources documentation lists .webm as a supported video file, so the file loads as a Media Source. We have not confirmed that OBS keeps the alpha channel of our WebM, so test it in a scene before relying on it, and try the ProRes 4444 MOV of the same clip if a background shows.
Much smaller. On one 30-second 1080x1920 clip, the transparent WebM was about 23 MB and the ProRes 4444 MOV about 975 MB. WebM is compressed for playback over a network, while ProRes keeps far more data per frame for editing. Your own sizes will vary with the length and resolution of the clip.
No. Uploads are MP4, MOV or WebM, and the downloads are transparent WebM, ProRes 4444 MOV, green screen MP4 and an alpha mask, so there is no GIF output and GIFs cannot be uploaded. If you need a GIF, convert the transparent WebM in a separate tool afterwards and check the edges before you publish it.
You do not need a converter. Upload the original clip again and choose ProRes 4444 MOV as the output, and the job produces the MOV directly with the alpha channel inside it. It is a new job, so it is charged again at 2 credits per second. If you convert a WebM yourself, check that the converter reads VP9 alpha and writes a format that keeps it.