# PNG to WebP Converter - Free, No Upload

Page: https://hirantha.me/tools/png-to-webp
Part of: Hirantha Sandaruwan Lakshan free tools (https://hirantha.me/tools)
Updated: 2026-07-31

Convert PNG images to WebP, free and in your browser.

This is a free tool that runs in the browser: open the page to use it. File tools process files on the visitor's own device; files are never uploaded or stored. No account, sign-up, payment or watermark.

Convert a PNG image to WebP entirely in your browser. WebP supports transparency just like PNG, so alpha channels are preserved rather than filled with a background colour.

The PNG is decoded and drawn to an off-screen canvas, preserving its alpha channel, then re-encoded as WebP - which supports lossless and lossy transparency, unlike JPEG.

For flat-colour images like icons and screenshots, WebP at a high quality setting is usually noticeably smaller than the source PNG with no visible difference.

If your browser can't encode WebP natively, a small WebAssembly encoder loads automatically as a fallback, verified with a real encode test rather than a browser check.

Q: Does WebP keep my PNG's transparency?
A: Yes, WebP supports an alpha channel the same way PNG does, so transparent areas stay transparent.

Q: Will WebP always be smaller than PNG?
A: Usually, especially for photos or complex images. For very simple graphics the difference can be small.

Q: Is my image uploaded anywhere?
A: No, conversion happens entirely in your browser tab.

Q: Can I convert several PNGs at once?
A: Yes, drop in a batch and they'll convert together.

Q: How much smaller is WebP than PNG?
A: Often dramatically smaller - 50% or more on screenshots and graphics, sometimes over 80%. PNG's lossless compression is simply less efficient than what WebP can do.

Q: Is WebP lossless like PNG?
A: It can be, but this tool encodes lossy WebP by default, which is where the big savings come from. For graphics with flat colour the difference is usually invisible.

Q: Does WebP keep my transparency?
A: Yes, transparency is preserved through the conversion.

Q: Will WebP work everywhere PNG does?
A: In browsers, yes. In older desktop applications and some email clients, not always - keep a PNG if the file has to open in arbitrary software.

Q: Does this work on my phone?
A: Yes - it runs in your phone's browser exactly like on a computer, with no app to install.

Sources: WebP - Wikipedia (https://en.wikipedia.org/wiki/WebP); PNG - Wikipedia (https://en.wikipedia.org/wiki/PNG)

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- [PNG to JPG converter](https://hirantha.me/tools/png-to-jpg.md): Convert PNG images to JPG, free and in your browser.
- [Image to Base64 converter](https://hirantha.me/tools/image-to-base64.md): Turn an image into a Base64 string, data URI, HTML tag or CSS snippet, or decode Base64 back into a picture. Runs in your browser, nothing is uploaded.