Blur the image background online

How to blur the background of a photo, while keeping the subject sharp?

Open Photopea.com and press File - Open, to open your photo.

We need to draw a selection line around the subject. It can be done with the Lasso tool, but there is a faster way: Press Select - Subject! When the subject is selected, press Select - Inverse, to "select the opposite".

Now, when the background is selected, press Filter - Blur - Gaussian Blur, and choose the value of a blur.

Confirm the blur by pressing "OK". Now, just click File - Export As - JPG, and save it to your device :)

Even better blur

We can get an even better effect! See how.

Separate the subject into a new layer

Open your photo in Photopea and press Select - Subject. Now, press Layer - New - Layer Via Copy, to put the subject into a separate layer on top (see "Layers" at the bottom right corner of your screen). Hide the new subject layer ("eye button") and select the original, bottom layer.

Remove the subject and blur the background

With the original layer selected, press Select - Subject, and then, press Select - Modify - Expand, set it to 5px. Now, press Edit - Fill - Content Aware, to "remove" the subject. Now, press Select - Deselect.

Press Filter - Blur - Gaussian Blur, and set the blur amount. Confirm by pressing "OK".

Pro tip: Use the Blur Gallery to apply a different amount of blur to each part of the background.

Place the subject on top

Now, unhide the top layer with a sbuject. Press File - Export As - JPG, and save it to your device :)