About this tool
What Blur Background does
Keep the subject sharp while softening the background.
The blur is applied only to the source behind the editable local alpha matte. Model inference and compositing both remain on the device.
Blur Background
Keep the subject sharp while softening the background.
On-device AI No signup
Local AI subject workspace
IMAGE NEVER UPLOADED
First use downloads and caches the browser AI runtime and Apache-2.0 quality model. Only model files are requested; your image stays on this device.
Beta implementation note.
This beta defaults to a 1024px IS-Net general-subject model and keeps MODNet as a faster portrait option. Both run in a dedicated browser worker, prefer WebGPU and automatically fall back to WASM; your image remains on this device.
How it works
- 01
Choose a subject-focused photo
Add a portrait or clearly separated subject and let the browser generate the first local AI mask.
- 02
Balance the edge and blur
Refine the foreground with Keep or Erase, adjust edge softness and control the background blur while watching the live result.
- 03
Save the focused image
Composite the sharp subject over the blurred source and export a JPG or PNG at full resolution.
Tips for better results
- Use moderate blur for a natural result.
- Inspect hair in Compare and Mask views.
- Keep a high-resolution source for export.
- Processing stays in the current browser tab; download the result before closing it.
FAQ
How do I use Blur Background? +
Add a portrait or clearly separated subject and let the browser generate the first local AI mask. Refine the foreground with Keep or Erase, adjust edge softness and control the background blur while watching the live result. Composite the sharp subject over the blurred source and export a JPG or PNG at full resolution.
Why does the blur affect the subject edge? +
Soft or missed mask pixels can reveal the blurred layer. Adjust edge cleanup and softness, then paint Keep over any foreground detail that should stay sharp.
What inputs and outputs does Blur Background support? +
You can start with JPG, PNG, WebP and export JPG, PNG. Actual decoding support can vary slightly by browser.
Does Blur Background upload my image? +
Blur Background runs in your browser. Your image is not uploaded to Image Toolkit.
Do I need an account for Blur Background? +
No. You can use this tool without creating an account.