Replace image backgrounds with solid colors, gradients, or other images after removal.
This tool separates the subject of an uploaded photo from its background, discards the original background pixels, and composites the subject onto a replacement you choose: a flat color, a gradient, or a second image. Everything runs in the browser, so the file never leaves your machine. The part people misjudge most is edge quality: fine detail like flyaway hair, fur, or a wine glass rim rarely cuts cleanly, because the mask is an approximation of the subject's outline, not true edge-aware matting, so those areas often need manual retouching after the swap.
The tool scans the uploaded image to distinguish subject pixels from background pixels and builds an alpha mask from that distinction. Edges are softened with partial transparency rather than a hard binary line, which keeps the cutout from looking jagged, but it also means the mask is a best-effort estimate rather than a pixel-exact trace, especially around hair and semi-transparent objects.
Once the mask exists, the original background is dropped and the chosen replacement, a solid fill, a gradient, or a second image, is drawn behind the masked subject at the same canvas dimensions. The two layers are flattened into a single output image; if you pick no replacement, the subject can be exported instead with a transparent background via the alpha channel.
Not reliably. The detection is tuned to find one primary subject, so with multiple people some may be included in the cutout and others partly cut away. Check the mask preview closely before downloading if your photo has more than one subject.
Yes, if you skip choosing a replacement fill or image, the tool exports a PNG with an alpha channel, which keeps the removed area transparent instead of filling it.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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