WhatsApp Sticker Maker

WhatsApp is strict about sticker files: each one must be exactly 512 × 512 pixels, saved as WebP, no more than 100 KB, with a transparent background, and every pack needs a 96 × 96 tray icon. This maker turns your images into files that meet those rules in one go. It can remove a plain background, trims empty space, adds the white outline WhatsApp recommends, keeps a margin, and lowers the WebP quality step by step until each sticker fits under 100 KB. Everything happens in your browser.

How to use this tool

1. Choose your images: PNGs with transparent backgrounds give the cleanest result; photos of objects on a plain background work with background removal.
2. Pick whether to keep the background or remove a plain or white one, and adjust the tolerance if edges are left behind.
3. Set the outline width and colour and the margin (8 px white and 16 px are the usual choices).
4. Download each sticker and the tray icon, or all of them as a ZIP.

Formula

art box = 512 − 2 × margin − 2 × outline; scale = min(box ÷ art width, box ÷ art height); WebP quality starts at 92 and drops by 8 until the file is ≤ 100,000 bytes

The outline is built from an exact distance map: every transparent pixel closer than the outline width to the art gets the outline colour, with a soft anti-aliased edge. Background removal is a flood fill from the image border through pixels whose colour distance to the background is within tolerance × 441.7 (the largest possible RGB distance), so similar colours inside the subject stay.

Example

A 1200 × 900 PNG of a cat with the defaults (16 px margin, 8 px outline): box = 512 − 32 − 16 = 464 px, scale = min(464 ÷ 1200, 464 ÷ 900) = 0.387, so the cat becomes 464 × 348 px, centred on the 512 × 512 canvas with its outline reaching 8 px further. A detailed photo-like sticker typically saves at quality 92 as a 40–90 KB WebP.