Convert PNG to WebP in your browser
Drop a PNG and Tinier converts it to WebP locally on your device using libwebp — the same encoder Chrome and Android use. WebP keeps the transparency your PNG has and typically comes out 25–45% smaller. Nothing uploads; you can disconnect your internet after the page loads and it still works. Up to 50 MB per file, 1 to 10 at a time.
Why convert PNG to WebP?
PNG is lossless, which makes it heavy — especially for screenshots, logos and graphics with flat color. WebP was built to replace it on the web: it supports the same alpha transparency, but compresses far smaller. Converting a PNG to WebP usually cuts 25–45% off the file with no visible difference, which means faster pages and smaller uploads without losing the see-through parts.
Does transparency survive the conversion?
Yes. Unlike converting PNG to JPG (which has no alpha channel and would fill transparent areas with white), WebP supports transparency natively. Your logo or cutout keeps its transparent background exactly as it was — that is the whole reason WebP is the right target for a PNG rather than JPG.
Why convert in your browser instead of a server?
Tinier runs libwebp compiled to WebAssembly right on your device, so the PNG is never uploaded anywhere. It is faster than a server tool on files under 10 MB because there is no upload or download round-trip, and it is private by construction, not by a promise in a policy. No account, no rate limit, no size paywall.
Frequently asked questions about PNG to WebP
Is my PNG uploaded to a server?
No. The conversion runs entirely in your browser with WebAssembly. Your PNG never leaves your device — you can turn off your internet after the page loads and it still works.
Will the transparency be kept?
Yes. WebP supports alpha transparency just like PNG, so transparent areas are preserved. (Converting to JPG, by contrast, would replace transparency with a white background.)
How much smaller will the WebP be?
It depends on the image, but PNG-to-WebP typically saves 25–45%. Graphics and screenshots with flat color tend to shrink the most. You can open the advanced control to trade a little quality for an even smaller file.
Can I convert several PNGs at once?
Yes. Drop up to 10 PNGs and download them individually, or grab them all as a ZIP. Everything is processed one after another on your device.
Related conversions
- WebP to PNG — the reverse — turn a WebP back into a lossless PNG.
- JPG to WebP — shrink photos for the web while keeping quality.
- Compress PNG — keep PNG but optimize it losslessly with OxiPNG.