Why Runway output doesn't already have a transparent background

Runway's video models generate the entire frame — subject and surroundings — based on your text or image prompt. Even if you prompt for a plain backdrop, the model renders it as ordinary pixels, not as an alpha channel, so the exported MP4 is always fully opaque. Getting a cutout means removing that rendered background as a separate step, which is exactly what RemoveGifBG automates.

Three steps from Runway to transparent

1. Generate and download. Export your Runway clip as an MP4, same as usual.
2. Upload to RemoveGifBG. No settings to configure — every frame is analyzed and processed automatically.
3. Download transparent. Export as GIF, APNG, WebM, or MP4 with a background color of your choice.

Runway background removal FAQ

Can Runway export video with a transparent background directly?

No. Runway generates a normal opaque MP4 based on your prompt — there's no built-in alpha-channel or transparent export option. To get a transparent result, you remove the background as a separate step after generating the clip.

How do I remove the background from a Runway clip?

Download your generated clip from Runway as an MP4, then upload it to RemoveGifBG. It's processed automatically, frame by frame, and you can export the result as a transparent GIF, APNG, WebM, or MP4 with a background color of your choice.

Will it work if my Runway clip has a busy or moving background?

Yes. Since Runway renders full scenes rather than flat colors, RemoveGifBG identifies your subject frame by frame instead of relying on a background color match, so it handles textured, moving, and photorealistic backgrounds — not just simple ones.

Is it free to try on a Runway clip?

Yes. Any file under 100 MB processes for free with no signup, with a preview — sample frames from across the clip — right in the browser before you decide. Signing up with an email gives free credits for full downloads.