PNG to WebP Converter
Shrink your PNGs by converting them to modern WebP — transparency preserved. Drop in a batch, dial in
the quality, and download each .webp or everything as a ZIP.
Everything is processed in your browser — nothing is uploaded.
How it works
PNG is a lossless format, which makes it perfect for screenshots, logos, and graphics — and terrible for file sizes. WebP brings the best of both worlds: it can encode losslessly like PNG, and when you allow a little loss it reaches compression levels PNG can never touch. For a photo-like PNG at 90% WebP quality, a 50–70% size reduction is routine, and even fully lossless WebP beats PNG by 25–35% on typical images. On an image-heavy page, that is a directly measurable improvement in load time and bandwidth.
This converter takes your .png files, decodes them with your browser's native PNG decoder,
and re-encodes each one as WebP at the quality you choose. One important detail: PNG
transparency is preserved. WebP supports an alpha channel, so logos, cutouts, and graphics with
semi-transparent edges convert faithfully — unlike conversion to JPEG, which flattens everything onto an
opaque background. The preview checkerboard you see in some tools is just a display trick; the alpha data
itself is carried through the conversion.
Quality guidance: for graphics, icons, and text screenshots where every pixel matters, set the slider to 100 for effectively lossless output. For photographic PNGs (screenshots of photos, gradients, textures), 85–95 produces files a fraction of the size with no visible difference. Keep your original PNG as the master and treat the WebP as a delivery copy. As with every Formatly tool, all decoding, encoding, and ZIP building happens locally in your browser — your images never leave your device.
Frequently asked questions
How much smaller is WebP compared to PNG?
For lossless WebP versus PNG, savings of 25–35% are typical. When PNGs contain photographic content, switching to high-quality lossy WebP can cut the file size by 50% or more with no visible difference.
Is PNG transparency preserved when converting to WebP?
Yes. WebP supports an alpha channel, so transparent pixels in your PNG carry over into the converted WebP. Semi-transparent edges and shadows are preserved too — unlike conversion to JPEG, which has no transparency at all.
Will converting PNG to WebP lose quality?
Only if you choose a lossy quality below 100. This converter encodes WebP with a quality slider: 100 is effectively lossless for PNG sources, while 85–95 gives much smaller files with quality the eye cannot distinguish. The original PNG is never modified.
Do all browsers support WebP now?
Yes — all current versions of Chrome, Edge, Firefox, Safari, Opera and mobile browsers display WebP, including transparent WebP. Only very old browsers (roughly pre-2020) lack support; for those, the <picture> element with a PNG fallback covers you.
Are my images uploaded during conversion?
No. Your PNGs are decoded and re-encoded as WebP entirely inside your browser. Everything is processed in your browser — nothing is uploaded to any server.