Blur Image Background
Blur a photo background while keeping the subject sharp — a portrait-mode effect powered by in-browser AI segmentation. Free, private, no signup.
About the Blur Image Background
This tool recreates the portrait-mode effect from phone cameras: the person or product stays perfectly sharp while everything behind them melts into a smooth blur. An AI segmentation model running inside your browser separates the subject from the background, then the original background is blurred and the sharp subject is composited back on top.
You control the blur strength with a slider from a subtle 4px depth-of-field to a heavy 20px bokeh-style blur, and the preview updates instantly. It works great on portraits, profile photos, product shots and any picture with a distracting or messy background.
The segmentation model (~40 MB) downloads to your browser on first use and is cached afterwards — your photo itself is never uploaded to any server, so private photos stay private. Download the finished image as JPG or PNG with no watermark.
How to Use the Blur Image Background
- 1Upload a portrait or product photo.
- 2Click Blur Background — the AI model detects the subject in your browser.
- 3Drag the blur slider until the depth-of-field effect looks right.
- 4Download the result as JPG or PNG.
Frequently Asked Questions
How does the background blur work?
An AI segmentation model (running via WebAssembly in your browser) cuts out the subject. The tool then draws your original photo with a blur filter as the background and layers the sharp subject cut-out on top — the same idea as portrait mode on a phone.
Is my photo uploaded to a server?
No. The AI model file is downloaded to your browser once (about 40 MB, then cached), but your photo is processed entirely on your device and never leaves it.
What photos work best?
Photos with a clear main subject — people, pets, products — and reasonable contrast with the background. Very busy scenes, thin hair strands or semi-transparent objects can confuse the segmentation at the edges.
Why is the first run slow?
The first use downloads the AI model to your browser cache. After that, processing usually takes only a few seconds per photo depending on your device.
Can I control how strong the blur is?
Yes — the slider goes from 4px (subtle depth of field) to 20px (heavy artistic blur), and the preview re-renders instantly without re-running the AI.