Green Screen & Chroma Key — On Your Phone
Key out a green (or blue) screen on mobile with spill suppression and edge feathering for clean edges. No green screen? ExpoCut’s on-device AI removes ordinary backgrounds too.
Free during public beta · runs on-device · your media never leaves your phone.
How to use green screen on mobile
Add your footage
Drop your green-screen clip on top of the background you want behind it.
Apply Chroma Key
Pick the key color (green or blue); ExpoCut removes it and reveals the layer beneath.
Refine the edges
Dial in spill suppression and edge feather so hair and edges look natural.
Export in 4K
Render on-device with your new background composited in.
Clean keys, two ways
Real chroma key
Spill suppression and feathering remove the green without a hard, cut-out look.
AI matting fallback
No green screen? On-device AI removes ordinary backgrounds frame by frame.
Composite freely
Layer your subject over video, photos, or generative backgrounds.
On-device & private
Everything keys on your phone — no upload.
Frequently asked questions
Can I do green screen on my phone?
Yes. ExpoCut’s chroma-key tool removes a green or blue screen with spill suppression and edge feathering, all on-device.
What if I don’t have a green screen?
Use AI background removal instead — it cuts the subject out of ordinary footage with no chroma backdrop required.
Does it work offline?
Yes. Keying and matting run on your phone, so they work without a connection and keep your footage private.
Related guides
Explore more ExpoCut tools
Key it out on your phone
Chroma key plus AI matting, both on-device. Free during the public beta.