You can remove an image background without uploading the file to a server. BG-Zero runs AI background removal directly in your browser with WebAssembly and WebGPU, so your photo stays on your device from upload to export.
BG-Zero processes images 100% locally in your browser. You select a file, the browser reads it with the File API, an AI model runs inference locally via WebAssembly/WebGPU, and you download a transparent PNG. No server ever receives your image.
Traditional background removal tools run AI models on their servers. This architecture requires your image to leave your device:
When your image leaves your device, you lose control over it:
BG-Zero's architecture ensures images never leave your device at any stage:
When you select or drag a file, the browser's File API reads it into local memory. No network request is made.
The neural network model (cached after first download) processes the image entirely on your device's CPU or GPU.
The AI output mask is applied to the image using the HTML5 Canvas API, creating a transparent background locally.
The final transparent PNG is generated in browser memory and downloaded directly to your device. No server involved.
Follow these steps to remove a background with complete privacy:
Visit BG-Zero in any modern browser. No signup or account required.
Click to upload or drag your image file. It is read locally — check the Network tab to verify.
Choose imgly (fast, compatible), Transformers.js (best quality), or rembg-web (flexible). Click remove.
Preview the result and download. The entire process happened in your browser memory.
BG-Zero offers three engines, all running locally in your browser:
| Engine | Best For | Model Size | Privacy |
|---|---|---|---|
| imgly (IS-Net) | Balanced quality/speed, all browsers | ~40MB | Local processing |
| Transformers.js (RMBG-1.4) | Best quality, portraits, complex edges | ~176MB | Local processing |
| rembg-web | Multiple models, flexible, MIT licensed | 4.7MB–176MB | Local processing |
You don't have to trust our claims. Here's how to verify independently:
| Feature | Local (BG-Zero) | Cloud Tools |
|---|---|---|
| Image upload required | No | Yes |
| Server access to image | No server involved | Full access during processing |
| Works after first load | Yes, after first model download | No, requires internet |
| Processing speed | Depends on device (1–5s typical) | Depends on server queue + network |
| Privacy guarantee | Architectural — no upload path exists | Policy-based — trust required |
| Best for | Sensitive, private, confidential images | Low-risk public images, API workflows |
Local processing with cached models enables background removal without any internet:
Common questions about removing backgrounds without uploading images
Yes. BG-Zero runs AI background removal entirely in your browser using WebAssembly and WebGPU. Your image is read by the browser File API and processed locally — no data is sent to any server.
No. BG-Zero has no image processing server and no image storage. The tool is open source (AGPL-3.0) so you can verify this claim by reading the code.
After the first visit, AI model files are cached in your browser. You can then process images without any internet connection as long as the cache is not cleared.
AI background removal needs a neural network model (40MB–176MB depending on engine). This downloads once to your browser cache. After that, no network is needed for processing.
It depends on your device. Modern laptops and phones process most images in 1–5 seconds. The advantage is zero upload/download wait and no queue, so total time is often comparable or faster.
Absolutely. Since images never leave your device, BG-Zero is ideal for sensitive materials: ID photos, unreleased product images, client assets, legal documents, and any image you cannot upload to a third party.
Yes. BG-Zero is licensed under AGPL-3.0. The full source code is available on GitHub, allowing anyone to audit the privacy claims and verify no image data is transmitted.
BG-Zero supports JPG, PNG, WebP, and BMP input (up to 25MB per image). Results are exported as transparent PNG files. No format conversion tools needed.
Your image stays on your device. Free, no watermark, no signup required.
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