AI Background Blur is a free, browser-based tool that uses the BEN2 AI segmentation model to detect the main subject, then blurs everything else — a portrait-mode effect for any photo.
Heads up: this uses a real AI segmentation model (BEN2, MIT licensed) running entirely in your browser via WebAssembly/WebGPU — nothing is uploaded to a server. The first use downloads and caches the model (~220MB), which is significantly larger than any other tool on this site; your browser only downloads it once. Works best in a recent version of Chrome or Edge.
How to use the AI Background Blur
- Upload an image.
- Adjust the blur strength.
- Click Blur background \u2014 the first use downloads the AI model (~220MB, cached afterward).
- Download the result once processing finishes.
Why use FreeToolsNets's AI Background Blur?
- 100% free, with no usage limits and no account required.
- Everything runs locally in your browser — nothing you type is uploaded or stored on a server.
- Works on desktop, tablet and mobile in any modern browser.
- No installation, no plugins, and no ads blocking the tool itself.
Frequently asked questions
Does this work like a phone's portrait mode?
Yes \u2014 same idea: the subject stays sharp while everything else gets a soft blur, applied after the fact rather than during capture.
Is my image uploaded anywhere?
No \u2014 the AI model runs entirely in your browser via WebAssembly/WebGPU; your image never leaves your device.
Is this tool free to use?
Yes, completely free on FreeToolsNets, with no sign-up and no limits.
Is my data sent to a server?
No. Everything runs locally in your browser using JavaScript — nothing you enter is uploaded anywhere.
Does it work on mobile?
Yes, the widget is fully responsive and works on phones, tablets and desktops.