rembg
Open-source Python library that removes image backgrounds locally using U2-Net and ONNX models. No uploads, no API calls, no cost, fully offline.
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What rembg does
rembg is an open-source Python library for background removal that runs entirely on your machine. It uses U2-Net and other ONNX models and processes images without sending anything to a third-party server. Install it with pip, use it as a CLI for batch jobs, import it as a Python library, or run it as a local HTTP server. It is free (MIT license), private, and has no usage limits.
rembg features
- Fully offline: no uploads, no API keys, no internet required
- CLI for batch processing from the terminal
- Python library for integration into scripts and pipelines
- Local HTTP server mode for service-style usage
- Multiple model options: u2net, u2netp, silueta, isnet-general-use, and more
Who rembg is for
- Developers and researchers who need privacy-first background removal
- Anyone processing sensitive images who cannot use cloud services
- High-volume batch jobs where per-image cloud costs add up
rembg FAQs
Is rembg free?
Yes. rembg is fully open-source under the MIT license, free to use with no usage limits or API keys.
What hardware does rembg need?
rembg runs on CPU or GPU. A GPU speeds up batch processing significantly; a modern CPU handles occasional use fine.
rembg vs remove.bg
How rembg compares with remove.bg on the parameters that matter for choosing a background removal tool.
| Parameter | rembg | remove.bg |
|---|---|---|
| Pricing | Free (open source, MIT license) | $0.22/image |
| Free tier | Unlimited (runs locally, no credits) | 1 preview/day (50 API calls/mo) |
| Free output resolution | Full resolution | 0.25 MP (~626 x 417 px) |
| Processing | On your device | Uploaded to servers |
| Watermark on free output | No | No (lower resolution) |
| Batch processing | Yes (CLI and Python library) | Yes |
| API | Yes (local HTTP server) | Yes |
| Signup required | No | Yes |
Verdict: Pick rembg over remove.bg when privacy, cost, or offline processing matter. remove.bg wins on ease of use and edge quality on difficult subjects like hair.
remove.bg values checked 2026-09-23 · rembg values checked 2026-09-23 · Source
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