A PNG with a transparent background can be five to ten times larger than it needs to be. Filemorph converts it to lossless WebP on your iPhone, keeping the transparency and cutting the file size, with nothing uploaded.
Logos, icons and UI mockups usually start as PNG because PNG supports transparency, but PNG's lossless compression is not very efficient — the same image often shrinks dramatically when re-encoded as WebP without losing a single pixel. If you are shipping design assets or app screenshots from your phone, that size difference matters.
Filemorph uses ImageIO's lossless WebP mode, which preserves the alpha channel and every pixel exactly, then applies WebP's more efficient compression algorithm on top. The result opens with transparency intact in any app or browser that supports WebP.
In the app: Convert → To WebP.
Lossless WebP keeps everything PNG keeps — transparency, exact pixels, no artifacts — while compressing meaningfully smaller. Use it for design assets, app icons and UI screenshots headed to the web; keep PNG when a tool specifically requires it.
Yes. Unlike web converters that upload your files to a server, Filemorph converts every file locally using Apple's frameworks. Nothing leaves your device, and it works with no internet connection. This conversion is in the free tier.
Yes. Filemorph uses lossless WebP, which preserves the alpha channel exactly, so transparent backgrounds and cutouts stay transparent.
No. PNG to WebP here is lossless — every pixel is preserved. If you want a smaller lossy WebP instead, use the Compress tool afterward.
Yes, it is part of Filemorph's free tier with no limit on the number of conversions.
Free, on-device, no upload. Plus 300+ more file operations.
Download on theApp Store