Images & photos
Trim transparent image borders
Crop to the visible alpha bounds and download the trimmed image.
A clear answer. Here’s how.
Finds the smallest pixel-aligned rectangle containing all pixels whose alpha exceeds the chosen threshold. Crops that rectangle without changing interior pixels and exports its original x/y/width/height as CSV. Fully transparent inputs produce an error. Does not trim a white or other opaque background. Supports PNG/JPEG/WebP up to 10 MB and 4 million decoded pixels per file. Browser decoding and single-frame PNG re-encoding remove source metadata/colour profiles; no files leave this device.