Telegram Sticker Maker - 512x512 PNG

Telegram's sticker rule is specific: PNG with transparency, one side exactly 512 pixels, the file under 512 KB. This tool exports a clean 512 x 512 PNG that satisfies it - stickers render large in chat, which is why the canvas is four times the side length of a Discord or Slack emoji. Non-square sources are scaled to fit and padded with transparency on the shorter axis, so nothing gets cropped; crop to 1:1 first if you'd rather fill the square.

The upload step trips people up, so it's worth being exact: send the PNG to Telegram's official @Stickers bot as a file, not as a photo. Sent as a photo, Telegram re-compresses it and strips the alpha channel, and your transparency is gone. Search @Stickers, start it, send /newpack (or /addsticker to extend a pack), and attach the PNG via the Files button - the bot adds it as-is.

Everything runs on your device - the Canvas API does the resize, a WebAssembly module decodes any iPhone .heic first, and the PNG saves locally with no upload. Most sticker artwork compresses well under the 512 KB cap; the tool warns if a busy photographic design goes over. Verify the no-upload behavior in the Network tab or by disconnecting after load.