Free Tool
Replace backgrounds and edit your videos — no After Effects, no subscription
Composite a new background, colour-grade, trim, and add text to MP4, WebM, and MOV clips — entirely in your browser.
The problem
After Effects and Premiere are expensive and complicated. Cloud services charge per minute and upload your footage to their servers. Building a clean, branded look normally means a studio or a subscription.
The NSS solution
The NSS Video Editor composites a replacement background as a layer behind your clip, then lets you colour-grade, trim, and add text — all in your browser. No upload. Export as WebM or MP4.
How to use it
- 1
YouTube intros and B-roll
Composite talking-head clips over a branded backdrop layer, add channel art or motion graphics, and export.
- 2
Product demo videos
Place your footage over a clean white or branded background layer for a studio look without renting one.
- 3
Social media video content
Create polished Reels and Shorts with layered backgrounds, grading, and text — no studio required.
- 4
Tutorial and course videos
Frame instructors over slide backgrounds or branded template layers without a green screen setup.
Step-by-step guide
- 1
Record your video
Any footage works. Good lighting helps, and you can layer a new background behind your clip.
- 2
Open the Video Editor
Go to /video-editor and drop your MP4, WebM, or MOV file. Files stay on your device.
- 3
Composite your background
Add a background layer — a solid colour, gradient, or custom image — behind your footage.
- 4
Edit and export
Colour-grade, trim, and add text overlays, then export at your target resolution.
Common questions
Do I need a green screen?
No. Add a background layer behind your footage in the editor — consistent lighting improves the result.
What video formats are supported?
MP4, WebM, and MOV input. Export is WebM or MP4.
Is there a file size limit?
Up to 500MB per video file and up to 5 minutes duration.
Will my video be uploaded to any server?
Never. All processing runs in your browser using WebAssembly and optional WebGPU acceleration.
Ready to try it?
No account. No subscription. No images uploaded to any server.
Open video editor free→