# Green Screen Remover - Chroma Key Video Online > Free online chroma key: click to pick the key color, tune it live, then add a color, image or video background or export transparent WebM, ProRes MOV or PNG. - URL: https://qilingtools.com/en/video/chroma-key - Category: Video Tools (https://qilingtools.com/en/video) - Tags: [Video](https://qilingtools.com/en/tags/video), [Creative Effects](https://qilingtools.com/en/tags/effects), [Recording](https://qilingtools.com/en/tags/record) - Last updated: 2026-10-26 - Price: Free, no sign-up - Privacy: Runs locally in the browser; files are never uploaded Footage shot against a green (or blue) screen can be placed on any background once that single color is keyed out. Upload a video and click the green screen in the preview to pick the key color, or choose standard green or blue with one click. Keying uses FFmpeg's chromakey by default — it keys by chroma, so it copes better with uneven lighting — or you can switch to RGB color distance. Similarity sets how much is removed, edge softness gives hair and other edges a natural falloff, and spill suppression cleans green light reflected onto the subject. Scrub to any moment to check the key: the live preview is computed in your browser with the same formulas as FFmpeg so every change shows instantly, and Exact preview renders the current frame with FFmpeg itself. Replace the background with a solid color, an image or another video (scaled to cover and optionally looped) and export H.264 MP4 with the original audio — or export with transparency as WebM (VP8 with alpha, for the web and CapCut), MOV (ProRes 4444, for Premiere, Final Cut and DaVinci Resolve) or a zipped PNG sequence. ## How to use 1. Upload a green-screen or blue-screen video 2. Click the background in the frame to pick the key color, adjust similarity, edge softness and spill removal, and scrub to check other frames 3. Choose a new background (color, image or video) or transparent output, click Remove background and download ## Features - Click-to-pick key color, one-click green or blue screen - Chroma-based chromakey or RGB color-distance keying - Adjustable similarity and edge softness, green or blue spill removal - Instant in-browser preview plus exact FFmpeg preview - Solid color, image or looping video backgrounds - Transparent export: WebM alpha, ProRes 4444 MOV, PNG sequence - Keeps the original audio; outputs H.264 MP4 - Runs locally in your browser, no upload ## FAQ ### The background is not fully removed, or holes appear in the subject. What should I do? First click the most representative part of the background to re-pick the key color, then adjust Similarity: raise it if background remains, lower it if the subject (especially clothing or highlights in the eyes) turns transparent. Turn on spill removal for green fringes and add some edge softness. Even lighting on the screen and keeping the subject a metre or more away from it make a much cleaner key. ### Which transparent format should I choose? Choose WebM for the web, CapCut, After Effects and other tools that support transparent WebM — the files are small. Choose ProRes 4444 MOV for Premiere Pro, Final Cut Pro or DaVinci Resolve: near-lossless but very large. If you are unsure what your software supports, a PNG sequence (ZIP) imports almost everywhere, but it is the largest and best for short clips. ### Why does the live preview differ slightly from the final result? The live preview is an in-browser approximation that uses the same per-pixel formulas as FFmpeg but does not simulate the edge averaging caused by 4:2:0 chroma subsampling, so edges can differ a little. Click Exact preview to see the current frame rendered by FFmpeg, which matches the export. ### Is my video uploaded? Is it free? Nothing is uploaded — keying and encoding run in your browser with FFmpeg (WebAssembly), so long videos take a while; trim to the part you need first. The tool is free, with no sign-up and no watermark. ## Related tools - [Compress Video](https://qilingtools.com/en/video/compress): Free online video compressor: shrink MP4, MOV and other formats with H.264 encoding and resolution scaling, at the strength you pick. Processed locally. - [Convert Video](https://qilingtools.com/en/video/convert): Free online video converter: convert MOV, MKV, AVI, FLV, WebM and more to MP4 or WebM. Powered by FFmpeg, processed locally, no upload. - [Trim Video](https://qilingtools.com/en/video/trim): Free online video trimmer: set start and end times to cut a clip; fast mode finishes in seconds without re-encoding. Processed locally, no upload. - [Video to GIF](https://qilingtools.com/en/video/to-gif): Free online video to GIF converter: cut a clip and create a high-quality animated GIF with adjustable frame rate and width. Processed locally, no upload. - [Extract Audio](https://qilingtools.com/en/video/extract-audio): Free online tool to extract audio from MP4, MOV and other videos as MP3, M4A or WAV. Processed locally, no upload. - [Video Screenshot](https://qilingtools.com/en/video/screenshot): Free online video frame grabber: enter a timestamp and save that frame as a full-resolution PNG or JPG. Processed locally, no upload. - [Mute Video](https://qilingtools.com/en/video/mute): Free online video muter: remove the audio track from a video in one click without re-encoding the picture. Finishes in seconds, processed locally, no upload. - [Merge Videos](https://qilingtools.com/en/video/merge): Free online video joiner: combine several MP4, MOV or MKV clips into one file, even when their resolution and frame rate differ. Processed locally.