Open shapes stay open
Border-connected cleanup reclaims gaps between chair legs instead of filling them as foreground.
100% private · Nothing ever leaves your browser
Remove image backgrounds
with true transparency
AI background removal that exports real alpha channel transparency. 100% private, free forever.
No upload to servers No signup required Unlimited, free forever
Model:
100% private — images are processed on your device and never uploaded
Watch the workflow
See what it can do
Drag the slider to reveal the before and after — same subject, background completely removed.
AI processes the image in your browser — your photo never leaves your device
The difference that matters
Other free tools
Export looks fine in the browser but shows a black background in Photoshop and Figma. Caused by premultiplied alpha baked into the RGB values.
NSS Background Remover ✓
Exports straight alpha — you see a real checkerboard in Photoshop. Drop it anywhere and it composites perfectly, no black edges.
How it works
Three steps, zero uploads, zero waiting. Learn more about the technology →
- 1
Drop your image
Drag and drop or click to browse. Supports PNG, JPG, WebP, AVIF, and HEIC up to 4096 × 4096 px.
- 2
AI removes the background
The neural network runs directly in your browser. No data leaves your device. Choose Fast (~45 MB) or GPU-first Best Quality (~99–192 MB).
- 3
Export true transparency
Download PNG, WebP, or AVIF with real straight-alpha transparency. Opens correctly in Photoshop, Figma, Canva, and everywhere.
Cut-out quality
A mask you can inspect and repair
The automatic result is only the first pass. Edge cleanup, topology recovery, and the restore brush protect thin furniture legs, hair, and openings that belong to the background.
Straight alpha
Export contract
White-edge restraint
Near-white fringe is tightened only in ambiguous alpha pixels, leaving confident subject structure intact.
Complex colour scenes
Multicolour backgrounds avoid destructive global colour-key logic and rely on the model mask.
Know before you process: Fine transparent glass, backlit hair, and colour-matched subjects may still benefit from a short brush-refinement pass.
Frequently asked questions
More questions? Visit the full FAQ →
Is NSS Background Remover really free?
Yes, completely free with no hidden paywalls or quality restrictions. The app is supported by non-intrusive ads. You get the same full-quality AI whether processing one image or a hundred.
Does it handle glass, plastic, and transparent products?
Yes — toggle "Glass / plastic mode" on the upload zone (or pass --transparent in the editor) and the post-processing pass preserves partial alpha through clear materials. Designed for jewellery, drinkware, bottles, and packaging — the cutout keeps see-through edges instead of treating them as fully opaque or fully transparent.
Are my images private? Do you store them?
Your images never leave your device. All AI processing happens locally in your browser using WebAssembly and WebGPU. There is no server that receives your images — we have no ability to see, store, or access what you work with.
What image formats can I upload?
PNG, JPG/JPEG, WebP, AVIF, and HEIC (iPhone photos). For animated images like animated GIFs or WebP, only the first frame is processed — a notice will confirm this.
What formats can I export?
PNG (recommended for transparency), WebP, AVIF, and JPG (with a solid or gradient background). PNG and WebP preserve full alpha channel transparency. AVIF offers the best compression at equal quality.
Why does my exported PNG show a black background in Photoshop?
This is caused by premultiplied alpha — a widespread bug in free tools. NSS Background Remover exports straight (non-premultiplied) alpha. Open our export in Photoshop and you'll see a real checkerboard, not a black box. See our help article for a full explanation.
What is "true transparency" or "straight alpha"?
Each pixel in a transparent image stores a color (RGB) and an opacity value (alpha). Premultiplied alpha pre-bakes the background color into the RGB, causing black halos when compositing. Straight alpha keeps them separate. All NSS exports use straight alpha — fully compatible with Photoshop, Figma, Canva, and every professional design tool.
Does it work offline?
Yes. After your first visit, the app caches itself and runs entirely offline. AI models are also cached locally after the first download. You can install NSS Background Remover as an app on your desktop or phone for quick offline access.
How accurate is the AI background removal?
We use ORMBG (fast, ~45 MB) and a browser-ready BiRefNet Lite 512 export (best quality, ~99–192 MB depending on the runtime). ORMBG is a general-purpose open model for everyday cutouts; BiRefNet Lite preserves finer detail on hair, fur, and complex edges. The built-in brush editor lets you refine any imperfect areas.
Do I need to create an account?
No account, no signup, no email address — ever. An account system would require storing your data, which conflicts with our privacy-first design.
How large can my images be?
Images up to 4096 × 4096 pixels are processed at full resolution. Larger images are automatically downscaled for inference, then the full-resolution mask is upscaled back — so your export is always at your original image dimensions.
Can I process multiple images at once?
Yes. Upload up to 20 images per session. They process one at a time to preserve device memory, and you can download all results as a single ZIP file with one click.
How does the AI work? Does it use a cloud API?
No cloud API. The AI runs entirely in your browser using Transformers.js, which loads ONNX-format neural networks directly. On supported hardware, inference uses your GPU via WebGPU for fast results. On other devices it falls back to WebAssembly — slower but still fully on-device.
Can I remove backgrounds from videos?
Yes. The Video Background Remover applies the same AI frame by frame to MP4, WebM, and MOV files. Output is WebM with transparent alpha or MP4 with a composited background. Processing is slower than images — expect ~15 min for a 30-second 720p clip on the Fast model. Your video never leaves your browser.
Ready to try it?
Drop your first image above — no signup, no install, no limits.
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