Runway, Pika, Sora, Kling, and every other AI video generator render a full scene — there's no green screen to key out. RemoveGifBG analyzes every frame automatically and gives you a clean transparent result, no manual masking and no special prompting required.
Runway, Pika, Sora, Kling, or anything else that exports MP4 or GIF
No green screen needed — handles full rendered scenes, not just flat backgrounds
Free preview with no signup; free credits for full downloads
Why a regular background remover falls short here
No signup needed for a preview — full downloads start with a free email signup
The short version, if you've tried a green-screen-only tool on an AI clip and it didn't work
Tools built for green screen footage look for one specific background color and remove every pixel close to it. AI video generators don't work that way — a prompt like "a fox running through a forest" renders a full scene with gradients, shadows, and moving detail behind the subject, so there's no single color to key out. RemoveGifBG instead analyzes each frame to identify the subject itself, the same approach needed for photorealistic or heavily-textured backgrounds, so it works whether your clip has a flat backdrop or a fully rendered scene.
Export as MP4 or GIF from any of these and upload directly — no conversion needed
How to get a transparent result from Runway Gen-4 output →
How to get a transparent result from Pika output →
How to get a transparent result from Sora output →
How to get a transparent result from Kling output →
Yes. Export your clip from Runway, Pika, Sora, Kling, or any other AI video generator as an MP4 or GIF and upload it to RemoveGifBG — every frame is analyzed and processed automatically, no manual masking or settings to configure.
Most simple background removers rely on a flat, solid-color background (like a green screen) to key out. AI video generators render a full scene — varied lighting, texture, and motion — so a color-threshold tool either misses most of the background or cuts into the subject. RemoveGifBG analyzes each frame to find the actual subject rather than just matching a background color, so it works on scene backgrounds as well as flat ones.
MP4 is the standard export from Runway, Pika, Sora, and Kling, and RemoveGifBG accepts it directly (MOV and GIF also work). No need to convert or re-encode before uploading.
Yes. Any file under 100 MB processes for free with no signup, and you can preview the result — sample frames pulled from across the clip — right in the browser before deciding. Signing up with an email gives free credits for full downloads; adding a card on file gives more still.
No. Because RemoveGifBG identifies the subject frame by frame rather than keying out a specific color, you don't need to add "green screen background" or similar wording to your generation prompt — it works on whatever scene the tool renders.