PNG to WebP
PNG to WebP re-encodes PNG images as smaller WebP files that keep their transparency, using your browser's own encoder, so nothing is uploaded.
Drag and drop, or click to upload PNG images
PNG or any other image, one or many · processed on your device, never uploaded
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Choose the format for your downloaded files.
View all browser-dependent input formats
At a glance
- Accepts
- PNG images, plus any other image your browser opens
- Outputs
- Lossy WebP files with transparency, quality 50 to 100%
- Where it runs
- Entirely in your browser, on your device
- What leaves your device
- Nothing - the file never leaves your device
- Limits
- No size or count cap; bounded by your device's memory; needs a browser with a WebP encoder, which Safari and every iPhone or iPad browser lack
- Account
- Not required - there is no sign-up
- Price
- Free, with no watermark and no usage cap
- Made by
- Visrut
- Last updated
- 8 October 2026
PNG to WebP is mostly a website job: page-speed audits flag large PNG images, and WebP holds the same picture, transparency included, in a far smaller file. It suits product cut-outs, hero images and photos that ended up saved as PNG. Each file is re-encoded by your browser's own WebP encoder in this tab, so nothing is uploaded.
What changes and what stays
- Transparency stays. The alpha channel is carried into the WebP.
- Some detail is traded for size. The output is lossy WebP; lower the quality slider for smaller files or raise it towards 100% for closer fidelity.
- Dimensions stay, metadata goes. Width and height are unchanged; text chunks and colour profiles in the PNG are not copied, and colours are saved as standard sRGB.
When to keep the PNG instead
- It is a screenshot of text or code. Lossy WebP blurs sharp glyph edges; PNG keeps them crisp and is often small enough already.
- Someone will edit it later. Keep the PNG as the master copy and publish the WebP, since every lossy save loses a little more.
- The file is going to an older tool. Some desktop software, print services and email clients still reject WebP. If you only need a smaller PNG, Image Compressor keeps the format.
- You are on an iPhone, iPad or Safari. Those browsers cannot create WebP files, so the conversion will not run there.
Frequently asked questions
Does PNG to WebP keep the transparent background?
Yes. WebP has an alpha channel, so transparent and semi-transparent pixels in the PNG stay transparent in the WebP. Logos and cut-out product shots keep working on any background colour.
How much smaller will the WebP be?
It depends on the image. Photos saved as PNG shrink the most: in our test a 2.0 MB PNG photo became a 212 KB WebP at the default 90% quality. Flat logos and icons are already small as PNG and save less.
Is the WebP lossless?
No. The browser's encoder writes lossy WebP, tuned by the quality slider (50 to 100%). At 90% the difference is hard to see in photos, but fine text and hard edges can soften, so check the preview before replacing a screenshot.
Why does it say my browser cannot create WebP files?
The conversion uses the browser's built-in WebP encoder. Chrome, Edge and Firefox have one; Safari does not, and every browser on iPhone and iPad runs on Safari's engine. The page checks this when it loads and tells you before you add files. On those devices, use a desktop browser or keep the PNG.