Upload a PNG and convert it to JPG. Since JPEG has no alpha channel, any transparent area is filled with a background color you pick — white by default, but adjustable — instead of turning black, which is what happens with a naive conversion.
Converted locally, the image never uploads
Drop it in or click to choose a file.
Fills any transparent area — white by default.
The converted JPG downloads immediately.
JPEG has no alpha channel — every pixel is fully opaque. A PNG with a transparent background converted naively (without explicitly filling that area first) renders those pixels as black in most implementations, since an unset alpha-blended pixel defaults to black rather than the color a viewer would expect. Filling the transparent area with an explicit background color first — before drawing the image on top — avoids that surprise entirely.
JPEG has no transparency support, and a naive conversion leaves unset alpha pixels rendering as black. This tool fills transparent areas with a background color you choose before converting, so that does not happen.
Yes — the color picker accepts any color, useful for matching a specific page background.
No. The conversion happens entirely in your browser using the Canvas API.
Generate cryptographically random UUID v4 or time-ordered UUID v7, in bulk.
Encode and decode Base64 with correct UTF-8 handling, including the URL-safe alphabet.
Generate ULIDs — sortable by creation time like UUID v7, but Crockford Base32 instead of hex.