Private image conversion
Convert PNG to WebP
Create WebP files from PNG images for leaner website assets. This can reduce image weight, but WebP creation must be supported by your browser.
Files
No files selected yet.About PNG and WebP conversion
PNG is dependable for transparent graphics and screenshots, but it can be heavy on the web. WebP is often a better delivery format for icons, interface captures, product images, and mixed artwork when your site or CMS accepts .webp files.
The worker decodes the PNG with browser-native image APIs, checks the decoded pixel budget, draws the bitmap to an OffscreenCanvas, and requests WebP output at the converter's fixed lossy quality. Transparency can be represented by WebP, but the exact size savings depend on the image content.
WebP output is limited by the browser's encoder. If the canvas API returns PNG or another type instead of WebP, the conversion fails with a clear support message rather than giving you a mislabeled file. Chrome and Firefox are the recommended browsers for this target.
Does this upload my files?
No. Everything on this page runs locally in your browser, so your files are never uploaded to a server. Close the tab and nothing is left behind. It even keeps working if you go offline after the page loads.
This is true for every tool on this site. Curious how that works? Read how browser-side processing works.
FAQ
Why convert PNG to WebP?
Use WebP for web delivery when PNG assets are too large and the destination site, CMS, or build pipeline accepts WebP.
Can PNG to WebP keep transparency?
WebP supports transparency, so transparent PNG pixels can remain transparent when the browser's WebP encoder handles them correctly.
Is PNG to WebP lossless here?
No. This converter uses the browser canvas WebP encoder with a fixed quality value, so the output is intended for smaller delivery files.
What should I do if WebP creation is unsupported?
Run the conversion in Chrome or Firefox, or choose PNG output when you need the current browser to produce a guaranteed file type.