Convert PNG to WEBP
Turn a .png image into a modern WEBP — right in your browser, with a real re-encode via canvas, not a server upload. Keeps transparency, at a fraction of PNG's file size.
Convert a PNG File to WEBP
Drop a .png file below. Your browser decodes it, then it's re-encoded as a real WEBP on a canvas — transparency preserved — previewed here, ready to download.
🔒 Nothing is uploaded — your file never leaves this deviceOn this page
Why convert PNG to WEBP
PNG's lossless compression makes for reliably large files, especially for photos. WEBP typically produces a dramatically smaller file for the same image while still supporting transparency — a common optimization when preparing PNG graphics or screenshots for a website.
Edge cases this tool handles
Transparency
Fully preserved — WEBP supports an alpha channel, so transparent and semi-transparent areas from the source PNG carry over.
Lossy encoding by default
This tool's WEBP output uses standard lossy compression (at a high quality setting), which is how canvas-based WEBP encoding works in the browser. For most photos and graphics this is visually indistinguishable from the source, but it's not bit-for-bit lossless the way the source PNG was.
Simple/flat-color PNGs (icons, logos)
These often compress extremely well in WEBP, sometimes even better proportionally than photos, since WEBP's compression handles both photographic and flat-color content well.
Frequently asked questions
Does converting PNG to WEBP upload my file anywhere?
No. The image is decoded and re-encoded entirely inside your browser using a canvas — the file never leaves your device or touches a server.
Does converting to WEBP keep transparency?
Yes — WEBP supports an alpha channel, so transparent and semi-transparent pixels in the source PNG are preserved in the output.
Is the output WEBP lossless like the source PNG?
No — this tool encodes WEBP using standard lossy compression at a high quality setting, which is how browser-based canvas encoding works. It's visually very close to the source for almost all images, but not bit-for-bit identical.
How much smaller will the file be?
It varies by image, but WEBP very often produces a substantially smaller file than an equivalent PNG, particularly for photographic content — flat-color graphics like icons see smaller but still meaningful savings.
Last updated September 23, 2026.