How to convert PNG to WebP
Drop your PNG files into the box above, or click Choose files. You can add several at once.
Adjust the quality if you like. The default is a good balance of size and detail.
Click Convert to WebP. Each file is processed on your device, usually in under a second.
Download the WebP files one by one, or all at once as a ZIP.
Why convert PNG to WebP?
PNG is lossless, which makes it large, especially for photos and detailed artwork. WebP supports the same full alpha transparency, so you can replace PNGs on your site without losing transparent backgrounds.
At 80–90% quality, detailed PNGs often shrink to a fraction of their size. Simple flat graphics shrink less because PNG already handles them well, and the result shows the exact saving for each file.
Smaller images load faster and improve Core Web Vitals, especially when a large hero or product image is a PNG.
PNG vs WebP
Both formats support transparency. PNG stores every pixel exactly, which is ideal for editing and for sharp text but expensive in bytes. WebP can be lossy or lossless; this converter creates lossy WebP with a quality setting, which gives much smaller files while keeping edges and transparency intact.
Keep your PNG as the master copy for editing, and publish the WebP.
| Property | PNG | WebP |
|---|---|---|
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes, full alpha channel | Yes, full alpha channel |
| Animation | Only as APNG, rarely used | Yes |
| Best for | Screenshots, logos, graphics with text | Images on websites and in apps |
| Support | Everywhere | All current browsers; some older desktop apps lack it |
Is it safe?
Yes. PNG to WebP runs entirely in your browser. Your files are read and converted by your own device using built-in browser technology, so they are never uploaded to a server and nobody else can see them.
You can check this yourself: open your browser's developer tools, switch to the Network tab and convert a file. No upload requests are made.
Transparent and semi-transparent pixels are carried over as they are; no background colour is added.
Files stay in this tab's memory only until you remove them or close the page.
Frequently Asked Questions
Is transparency preserved when converting PNG to WebP?
Yes. WebP supports a full alpha channel, so transparent and semi-transparent pixels are kept.
Is the WebP lossless?
No. This converter creates lossy WebP files, and the quality slider sets the trade-off between size and fidelity. At 90% and above, most graphics are visually indistinguishable from the PNG.
Why is my WebP only slightly smaller than the PNG?
Simple graphics with a few flat colours already compress well as PNG. The biggest savings come from photos, gradients and detailed illustrations.
Should I convert screenshots with text to WebP?
Yes, but use a higher quality (90% or more) so small text stays crisp.
Can I use WebP instead of PNG for my website's logo?
You can, and all modern browsers support it. If you have a vector version of the logo, SVG is often an even better choice.