PixHeic
Convert HEIC for WhatsApp Stickers
Most guides tell you to make a PNG. WhatsApp stickers are actually WebP — here is what the format requires and which converter to use.
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Drop your .heic files into the converter and download lossless PNGs with any transparency intact. Decoding runs on your device via WebAssembly, so nothing is uploaded to a server.
Open the PNG converter Free, no sign-up, no watermark. Alpha channels are preserved.Zero uploads
The decoder runs in your browser via WebAssembly. Your files never touch a server, so there is nothing to retain, leak or subpoena.
Transparency preserved
If your source carries an alpha channel, it survives the conversion intact. PNG is the only common photo format that keeps it.
Lossless output
PNG stores every pixel exactly. Re-saving a sticker ten times leaves it identical to the first save, unlike JPEG.
The format WhatsApp actually wants
WhatsApp's sticker format is WebP with a transparent background, 512 × 512 pixels, and a tight file size ceiling for static stickers. PNG is what you will design in, but WebP is what ships.
That makes our HEIC to WebP converter the right tool for the final asset. Use PNG as your working format if you are editing, then produce the WebP at the end.
Why the size limit bites
Static WhatsApp stickers must come in well under a hundred kilobytes, which a detailed 512-pixel PNG will blow through easily. WebP is what makes the budget achievable at all.
Both converters carry a 512 px sticker preset, so the crop and scale happen during conversion. Most people still use a sticker-maker app for the packaging step; these tools handle the format conversion those apps cannot do from a HEIC.
Converting preserves transparency — it does not create it
PNG supports an alpha channel, and this converter carries one across if your source already has one. A normal photo taken on a camera has no transparency, and converting it to PNG will not cut the subject out — you will get the same picture with the same background, in a larger file.
To get a transparent subject, remove the background first. On an iPhone, press and hold the subject in Photos to lift it out, then share it as an image; on a desktop, use the background removal in your editor of choice. Convert afterwards and the transparency comes through.
Use the WebP converter for the final file.
This page explains the format; the asset itself should be produced with our HEIC to WebP converter, which runs in your browser the same way.
Frequently asked questions
What format do WhatsApp stickers use?
WebP, at 512 × 512 with transparency and a small file size ceiling for static stickers. PNG is useful as a working format while you edit, but the file you package into a pack needs to be WebP.
Will my transparent background survive the conversion?
Yes, if the source has one. HEIC supports an alpha channel and PNG preserves it, so a lifted subject or an edited cut-out comes through with its transparency intact. What conversion cannot do is add transparency to a photo that never had it.
Does this tool resize images to the required dimensions?
Yes. The converter has an Output size control with presets for the common targets — Discord and Slack emoji at 128 px, Twitch emotes at 112 px, stickers and avatars at 512 px — each of which centre-crops to a square and scales the longest edge down as it converts.
Large reductions are done in halving steps rather than one draw, which is what keeps a 128 px emoji from looking crunchy. Images are never enlarged: ask for 512 px from a 300 px source and you get 300 px.
Is anything uploaded to a server?
No. PixHeic decodes your file with a WebAssembly build of libheif that runs inside your own browser tab, so the image is read from your device into memory and converted there. You can confirm it in your browser's Network tab, or disconnect from the internet after the page loads and convert anyway.