Why convert PNG to WebP?
PNG is excellent for graphics with transparency but pays a huge size penalty for it — a typical UI screenshot in PNG can be 5–10x heavier than the same image as WebP. WebP supports both lossy and lossless compression with alpha channel, so you keep the transparency that PNG gives you and shed most of the bytes.
For logos, icons and product cutouts the gain is dramatic and visually indistinguishable. For dashboards and screenshot-heavy pages, switching PNG to WebP often shaves megabytes off the page weight.
Does it keep the transparent background?
Yes. WebP fully supports an 8-bit alpha channel, so any PNG with transparency converts cleanly: anti-aliased edges, semi-transparent shadows and gradient masks are preserved exactly.
How the converter works
- Drop or select one or more PNG files (up to 20 MB each).
- We re-encode them with libvips, preserving the alpha channel and choosing quality 80 by default for lossy compression.
- Download the WebP directly, or grab a ZIP for multiple files.
Frequently asked questions
Yes. WebP supports an 8-bit alpha channel, so transparent and semi-transparent areas of the source PNG are preserved exactly.
For UI screenshots, dashboards and graphics PNGs typically shrink by 60–80%. For simple logos and icons, expect 40–70% depending on color complexity.
By default we use WebP's lossy mode at quality 80, which is visually indistinguishable from the PNG for almost every use case. If you need true lossless, register and select the highest quality preset.
Yes, every modern browser supports WebP — Chrome, Firefox, <a href="https://caniuse.com/webp" target="_blank" rel="noopener">Safari (14.1+)</a>, Edge and Opera, covering >97% of global traffic.