Introduction

BG0 removes image backgrounds locally in your browser. No uploads, accounts, API keys, or server inference.

BG0 is an open-source, browser-only background remover. Choose an image, remove its background on your device, and download a transparent PNG. Nothing is uploaded.

How it works

BG0 runs BiRefNet, a segmentation model that predicts an alpha mask for the subject of a photo. The mask is composited onto the original pixels to produce a PNG with a transparent background.

The web app and @bg0/browser use browser hardware hints to choose whether to attempt a pinned full BiRefNet ONNX model or BiRefNet-lite, with automatic fallbacks if the selected model cannot run. See the selection rules and verification scope for details. Images stay on your device throughout selection and fallback.

Privacy

Image bytes never leave your browser. The web app has no upload step and no account. bg0.parastus.me runs no analytics and collects no image contents or metadata.

License

BG0 is licensed under Apache 2.0. The model weights carry their own license, documented in the repository’s third-party notices.