Cut a subject out of a green-screen still — chroma key, in your browser

Chroma keying for stills, in plain English

Chroma keying is the technique broadcast television invented in the 1940s for the weather-forecast cutout — shoot the subject against a uniformly-colored backdrop (originally blue, today usually green because modern digital sensors are more sensitive to the green channel), then in post replace every pixel of that colour with transparency. Video editors do it as a real-time effect in Premiere, Final Cut, DaVinci Resolve, OBS Studio, and every other major NLE — but those workflows are tuned for video frames, not for still-image exports. When you only need ONE chroma-keyed frame (a thumbnail, an OBS overlay, a slide-deck portrait, a webinar speaker card), spinning up an NLE to render a single still feels like overkill — and most NLE chroma-key effects don't have a built-in 'export this single frame as a transparent PNG' shortcut anyway.

This editor exists for the still-frame case specifically. The cutout pipeline runs in-browser ONNX/WASM segmentation tuned to handle chroma-screen edges (spill removal, despill on hair detail, edge-colour neutralisation) and writes the result as a true PNG-24 with 8-bit alpha — the universal transparent-image format every downstream tool expects. The output drops cleanly into OBS Studio as an Image source, into Premiere/Final Cut/Resolve as a transparent overlay layer, into PowerPoint/Keynote/Google Slides as a slide-deck portrait, into Photoshop or Affinity Photo as a layer for compositing, into Figma or Sketch for thumbnail mockups. Same format every existing pipeline already reads correctly. No video render, no NLE timeline, no proprietary export setting — just upload the chroma-screen still and download the transparent PNG.

Why a free still-frame chroma key beats spinning up an NLE

The competitive landscape for still-frame chroma keying is uneven and somewhat absurd. DaVinci Resolve (free, professional-grade NLE) does chroma keying excellently but only as part of a video timeline; exporting a single still as a transparent PNG requires a multi-step workflow most casual users won't navigate. Premiere Pro and Final Cut Pro have similar friction at R22.99/mo and R299 lifetime respectively. Photoshop has a Colour Range tool that can do basic chroma keying (no despill) and costs R22.99/mo Photography plan. The dedicated still-frame chroma-key tools online are mostly thin wrappers around generic background removers that don't even know to look for the chroma colour, so they treat the green backdrop as one of N possible backdrops and miss the spill-removal step entirely. This editor delivers proper chroma-key spill removal at R0 — same edge quality the NLE pipelines deliver, no NLE timeline required. The license at /commercial-use-background-remover/ permits commercial streaming and course-content use; the privacy architecture at /private-background-remover/ keeps unreleased course-video stills entirely in your browser during processing.