About
What this is
GreenBG Remover is a free browser tool that removes a green screen from a video or a photo and gives you back a transparent result. It is built and maintained by an independent developer. There is no company logo wall, no sales team, and no account to create — you open the page, drop a file, and export.
The whole thing runs inside your browser tab: the decoding, the keying, the edge refinement and the encoding are done by WebAssembly and WebGL on your own machine. Your footage is never uploaded, and there is no server-side render step anywhere in the pipeline. That is not a marketing line — it is the reason the tool can work with your Wi-Fi turned off after the page has loaded.
Why it was built
Most online background removers ask you to upload your footage before you can see whether the tool is any good. That is a bad trade. Uploading a client's footage, an unreleased ad, or a video of your own children to an unknown server — just to find out that the free tier stamps a watermark or caps you at ten seconds — costs you privacy for a test you could have run locally in the first place.
So this tool inverts the order. Everything happens on your device; nothing is asked for in return; there is no upload button to press by accident. If it is not good enough for your footage, close the tab. Nothing left your computer.
What it does that a plain colour picker does not
- Tolerance and edge softness are separate controls. Cranking tolerance is the usual reason a cutout ends up looking like it was made with scissors. Here you take tolerance only as far as the background needs, then use edge softness to restore a natural transition.
- Spill suppression for the green rim. Light bouncing off a green screen lands on hair and shoulders. A green-channel limiter pulls that fringe back to neutral without desaturating skin.
- AI subject mode for non-green footage. When the background is an office, a street or a badly lit screen, colour keying fails. Subject mode segments the person instead.
- Real transparency in the output. MOV, MKV and APNG carry an alpha channel, so the cutout drops into an editor with the transparency intact rather than on a black rectangle.
- Honest reporting of what does not work. Transparent WebM is not offered here, and the formats page explains exactly why: the alpha plane does not survive the encode, and shipping a file that lies about its transparency is worse than not shipping the option.
How the site is paid for
Advertising. The tool is free and there is no paid tier, no watermark and no export limit, so the hosting and the development time are covered by ads on the page. Advertising partners may set cookies to measure and target those ads, and that is described in full in the privacy policy. If you would rather block them, block away — every feature of the tool keeps working.
What it deliberately does not do
No batch queue, no API, no cloud storage, no account history, no per-frame rotoscope brush. Each of those would require your files to leave your machine or your identity to be tracked, which is the thing this tool exists to avoid. The limits section on the main page goes through the practical consequences in detail, including which jobs need a desktop compositor instead.
Who it is for
- Editors who need a transparent MOV or APNG and do not want to install a second application for one clip.
- People working with sensitive material — legal, medical, journalistic, or simply personal — who cannot upload it to a third party.
- Anyone on a machine where installing software is not an option: a locked-down work laptop, a borrowed computer, a phone.
- Students and hobbyists who need a cutout for a thumbnail, a slide or a short loop, and do not want an account or a subscription for it.
Accuracy and honesty
Where this site quotes a number, it says where the number came from. The alpha-channel table on the main page was produced by encoding a half-transparent frame, decoding it again and reading the value back — not by assuming the format supports transparency. The size and render-time tables state plainly whether they are computed from bitrate arithmetic or measured on real footage. Where something has not been measured, the page says so instead of inventing a figure.
Contact
Bug reports, feature requests and corrections are all welcome at mccauleynarrowlb592@gmail.com. If the tool got something wrong on your footage, a description of the clip — resolution, frame rate, how the screen was lit — is the fastest way to get it fixed.