Face Blur
Find faces automatically and blur, pixelate or box them out — AI on your device.
About this tool
Press one button and a face detector finds the faces; choose blur, pixelation or a solid box; drag extra boxes over anything it missed; download. The detector (about 1 MB) is served from this site and runs on your device — the photo is never uploaded.
How it works, and what actually protects privacy
The detector is UltraFace, a small open-source network trained to find faces at 320×240 — fast enough for a phone, small enough to fetch once and cache. The neural runtime that executes it comes from the jsDelivr CDN the first time you press the button (code only, never your image), the same arrangement as the background remover. Detection is good on clear frontal and three-quarter faces and worse on tiny, profile or partly hidden ones, which is why manual boxes exist: click-drag adds one, a click inside a box removes it. Then the honest part about blurring. A light Gaussian blur hides identity from a glance but can be partially reversed, and researchers have re-identified blurred faces using surrounding context. For a photo that genuinely must not identify someone, use pixelation at high strength or the black box, both of which discard the information rather than smear it. The photo blur tool handles regions other than faces; the EXIF remover strips the location data a photo also carries.
Frequently asked questions
Is my photo uploaded to detect faces?
No. The 1 MB detector model is served from this site and the runtime that executes it comes from a CDN, both on first use; detection and blurring then run in your browser. The image itself never leaves your device.
Is blur enough to hide someone?
Not reliably. Blur can sometimes be reversed and blurred faces have been re-identified from context. For real anonymity choose pixelate at high strength or the black box — those destroy the information instead of smearing it.
It missed a face — what now?
Drag a box over it. The detector is weakest on small, turned-away or partly covered faces, so a quick check of the result is always worth it. Click inside any box to remove it.
Does it work on group photos?
Yes — every face above the confidence threshold is boxed. On very large groups the smallest faces may need manual boxes.