Backgrounds

After the background is removed you can leave it transparent or put something new behind the subject: a solid colour, a photo of your own, or a blurred copy of the original. Pick one under Background in the left panel. The preview updates instantly, and the same choice is applied to every file you download, copy or put in a ZIP.

Which background options are there?

Option	What goes behind the subject	Saved as
None	Nothing. The area around the subject is transparent	PNG or WebP keep the transparency; JPG gets white
Color	One solid colour	Any format
Image	A photo you choose, scaled to fill the frame	Any format
Blur	A blurred copy of the original photo	Any format

How do I change the background colour of a photo?

Choose Color. Six swatches cover the usual requests:

• white #ffffff, the marketplace and passport-photo standard
• black #000000, handy for checking hair edges too
• light grey #f3f4f6
• pale yellow #fde68a, pale blue #bfdbfe and pale red #fecaca for social posts

For anything else, click Custom and use your system's colour picker. The colour is saved with your other settings, so a shop that always uses the same brand grey sets it once.

How do I put the subject on a different photo?

Choose Image, then Choose background image and pick a file. The backdrop is drawn the way CSS object-fit: cover works: scaled until it covers the whole output frame, centred, with any overflow cropped. It never stretches. If the backdrop's shape is very different from your cutout's, crop the backdrop first or set an exact output size under Resize so you control the frame.

The backdrop image is used for every photo in the session, which makes it easy to put a whole product range on the same studio background. It is not remembered after you leave the page: local storage cannot hold a file, so the setting reverts to None next visit.

How does the blur background work?

Blur puts a softened copy of your original photo behind the sharp cutout, the familiar portrait-mode look. The blur is drawn at download time with a radius that scales with the output: the larger side of the image divided by 90, and never less than 4 pixels. A 4000 pixel export gets roughly a 44 pixel blur and a 400 pixel export gets 4, so both look alike at their own size.

Because the blurred layer is the original photo, its framing follows the cutout exactly, including when you resize or crop to the subject.

Why is my JPG background white?

JPEG has no alpha channel, so a transparent pixel cannot be stored in it. When Background is None and Format is JPG, the tool fills the frame with white before drawing the subject and shows a note under the format switch saying so. If you need transparency, switch to PNG or WebP. File formats compares the three.

Where do the edges come from on a new background?

From the cleaned alpha matte and the recovered edge colours, not from the original background. Semi-transparent hair pixels have their colour re-estimated before the new background goes under them, which is why a subject shot against a green wall does not bring a green rim onto white. Edge quality has the numbers.

Need to adjust the finished file further? The image resizer and image compressor both take the downloaded PNG or WebP, and they run client-side too.