PNG to WebP free — no upload
Convert PNG images to WebP right in your browser — transparency is kept and files get much smaller. Your images never leave your device.
Drop files or click to choose
100% local private compression. Files never leave your device.
How to convert PNG to WebP
- Drop one or more PNG files into the box above — WebP output is already selected.
- Optionally adjust the Quality slider in the image settings (80% by default).
- The files are converted automatically; compare before and after.
- Download each WebP image, or all of them at once.
How PNG to WebP conversion works in MiniFiles
- Processed on your device. Compressor.js re-encodes each image with your browser's own WebP encoder. Nothing is uploaded.
- Transparency kept. WebP supports an alpha channel, so transparent backgrounds and soft edges stay transparent.
- Much smaller files. Screenshots, graphics and especially photos saved as PNG usually shrink a lot as WebP, because PNG is lossless and WebP here is lossy at the quality you choose.
- Lossy output. MiniFiles produces lossy WebP. At high quality the difference is hard to see, but for pixel-exact graphics keep the PNG — see Compress PNG.
- Free to use. WebP conversion is free on every plan. Without an account you can convert 10 files a day; a free account removes the daily limit. No file size limit.
Step-by-step guide: how to convert images to WebP without uploading them.
Frequently asked questions
Does MiniFiles upload my PNG files?
No. The conversion runs entirely in your browser, so your images never leave your device.
Does WebP keep PNG transparency?
Yes. WebP supports transparency, and MiniFiles keeps the alpha channel when converting PNG to WebP.
Is PNG to WebP conversion lossless?
No — MiniFiles creates lossy WebP at the Quality setting you choose (80% by default). Raise the quality for near-identical results, or keep PNG when every pixel must stay exact.
How much smaller is WebP than PNG?
It depends on the image. Photos stored as PNG often shrink dramatically; flat graphics shrink less. The before-and-after sizes are shown for every file.
Is it free?
Yes. WebP output is free on every plan. Without an account you can convert 10 files a day; a free account removes the daily limit. No file size limit.
More private PDF and image tools
Every MiniFiles tool runs in your browser — your files are never uploaded.