Background blur — the creamy separation between a sharp subject and a soft backdrop — is what makes portraits from big-lens cameras look expensive. Phones fake it with portrait mode at capture time, but if the photo is already taken, you need to add it afterward. This tool does exactly that, right in your browser: tap your subject to place the focus point, and everything beyond it melts into a smooth, natural blur.
Background blur controls the strength, Focus size sets how much of the image stays sharp around your tap point, and Edge softness feathers the transition so it never looks like a cut-out. It works on photos from any phone — iPhone, Android — or camera, and nothing is uploaded anywhere. Free, no app to install, full-resolution export.
How to add the blur background effect to a photo
Tips for the best blur background look
- Place the focus point on the face or main subject, then widen Focus size until the whole subject is inside the sharp zone.
- Keep Edge softness high (55–75) — a gradual transition reads as real lens optics; a hard edge reads as an edit.
- Moderate blur (12–22) usually looks more professional than maximum blur, which can feel artificial.
Blur Background effect — FAQ
Can I blur the background of a photo already taken on my iPhone?
Yes — that is exactly what this tool is for. Upload the photo from your camera roll, tap your subject to set the focus point, and adjust the blur. It works on any existing photo, no portrait mode needed at capture time.
How does it know what the background is?
It uses a focus zone around the point you tap: everything inside stays sharp, and blur increases gradually outside it. It is a fast optical-style approach — for subjects that roughly fit a zone (people, pets, products, food) it looks convincingly like real depth of field.
Will the blurred photo lose resolution?
No — the effect is re-rendered on your original file at export, so a 12-megapixel photo exports at 12 megapixels with the subject still pin-sharp.