# Blur the background of a photo

> Drop a portrait. The subject is found on your device and everything behind it is blurred.

Blur the background behind a person or pet, portrait-mode style. An AI model finds the subject on your device. Set the strength, download. Free, no upload.

- Tool: [Blur background](https://fixmint.cc/blur-background)
- Category: [Photos & images](https://fixmint.cc/photos)
- Fixes: Background is distracting
- Runs in the browser: files and text stay on the device, no sign-up, free.

## How to blur the background of a photo

1. Drop a portrait with one clear subject: a person or a pet.
2. The model finds the subject in a few seconds. Drag the slider to compare.
3. Set the blur strength, add black and white if you like, then download the JPG.

## Questions

### Is my photo uploaded?

No. The AI model downloads once to your browser and runs there. The photo is processed on your device and is never sent anywhere.

### Is this real depth of field?

No. A camera with a wide aperture or a depth sensor measures real distance. This tool estimates the subject from one image and blurs the rest, so hair, glasses or objects that overlap the subject can look less natural at the edge.

### Why is the first run slower?

The first time, your browser fetches the runtime and the model, about 16 MB before compression. After that they are cached, and the tool works offline.

### Does it keep the full size?

Yes. The JPG has the same width and height as the photo. If your device cannot process a very large photo, it is reduced to fit and the tool says so.

## Related tools

- [Remove background](https://fixmint.cc/remove-background): Background needs to go
- [Blur faces](https://fixmint.cc/blur-faces): Faces need hiding in a photo
- [Brighten photo](https://fixmint.cc/brighten-photo): Photo is too dark
- [Crop image](https://fixmint.cc/crop-image): Needs to be square