About Blur Photo Background
This page cuts the subject out and puts a blurred copy of your own photo behind it, like a portrait mode. The blur strength is a slider. It is free, needs no sign-up and runs in your browser, so nothing you enter is uploaded.
It is a flat blur, not a depth-based one, so objects at the same distance as the subject are blurred as well. For a quick portrait or a tidy room, that is usually what you want.
How to use Blur Photo Background
- Pick a quality: Fast (MODNet, about 7 MB) or High quality (BiRefNet lite, about 115 MB, WebGPU recommended).
- The small model loads by itself when the page opens (not on Data Saver); confirm the download of the large one. The source and size are shown on the model card.
- Add photos by dropping them, tapping the box, pasting with Ctrl or Cmd + V, or using the phone camera. Up to ten per batch.
- Choose a background: Transparent, Colour (swatches or any colour), Blur, or Picture.
- Drag the edge softness slider if the cut line looks harsh or has a halo. The preview updates as you move it.
- Compare before and after, then press PNG to save the open image, or ZIP to save every finished image together.
Features
- Transparent PNG at the full size of your original photo (up to 6000 px on the long side).
- MODNet for speed, BiRefNet lite for hair and fine edges.
- Background swap: transparent, any solid colour, a blurred copy of the photo or your own picture.
- Edge softness slider that feathers the cut line.
- Batch of up to ten images with a single ZIP download and unique file names.
- Input by drag and drop, file choice, paste or phone camera.
- Before and after as a drag slider on phones and side by side on large screens.
- Runs on your device: the model is the only thing downloaded.
Privacy: how it works
- Photos are processed in your browser and are never uploaded to Ulkaa or to anyone else.
- The only download is the model: MODNet (about 7 MB) or BiRefNet lite (about 115 MB) from Hugging Face. That request does not contain your photos. Your browser may cache the model for next time.
Tips
- For a product photo, use a plain background when you shoot and choose a solid colour here. Light grey or white both suit shops.
- Use the blur background for portraits: it keeps the photo natural and hides a messy room.
- If the cut line shows a light halo on a dark background, raise the edge softness by one or two steps.
- On a slow phone, stay on Fast. High quality on the CPU can take a minute for each image.
Frequently asked questions
Is it really free?
Yes. There is no price, no trial and no credit card. Ulkaa Tool does the work with your own device, so there is no server bill to pass on to you.
Do I need an account?
No. There is no sign-up and no login. Open the page and use it. An Ulkaa account is not needed for anything on this tool.
Does it run in my browser?
Yes. Your photos are processed by code running in your browser tab, on your own device.
Is my data uploaded?
No. Your photos are never sent to Ulkaa or to anyone else. You can check this yourself by watching the Network tab in your browser developer tools while you use the tool.
How strong can the blur be?
The slider goes from light to strong. The blur radius scales with the photo size so it looks the same on a small image and a large one.
Does it blur faces in the background?
It blurs everything that is not the subject. For privacy blurring of faces, use the face detector.
More Background Remover pages
- Background RemoverCut out the subject of a photo, then keep it transparent or put it on a new background, all on your device.
- Remove Background From a PhotoDrop a photo and get the subject back as a transparent PNG at the size of the original.
- Make a Transparent BackgroundGet a PNG with a transparent background and a crisp cut line.
- White Background MakerPut the subject of your photo on a plain white background.
- Product Photo Background RemoverClean product shots for your shop, from a phone photo.