Convert PNG to WebP
Turn PNG files into WebP while keeping transparency. Especially effective for pages full of screenshots and diagrams.
- ✓ 100% Free
- ✓ No Sign-up
- ✓ No Watermark
- ✓ Client-Side Processing
- ✓ No Installation
- ✓ Batch Support
or drag & drop files here
Supported formats: JPG / JPEG / PNG / WebP
Runs entirely in your browser, nothing is uploaded
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Why convert PNG to WebP
PNG is lossless, so the quality is perfect — but a single screenshot or diagram can easily reach several megabytes. WebP supports transparency too, and usually stores the same image far more compactly.
This page opens with the output format already set to WebP. Add your PNG files and press Convert. Everything runs inside your browser and no image is uploaded to a server.
Transparency is preserved
WebP supports an alpha channel, so transparency in your PNG carries straight over. Cut-out logos and icons convert without picking up a white background.
This is the key difference from JPG: converting to JPG always destroys transparency, while WebP keeps it and still reduces the file size.
Why screenshots benefit the most
PNG does not compress in blocks, so even large areas of a single flat color cost real bytes. For UI screenshots with a limited palette, WebP frequently comes in at less than half the size.
WebP is lossy, though. Push the quality too low and thin rules and small type start to blur. For captures where the text must stay readable, keep the quality at 90 or above.
If you need every pixel preserved exactly, keeping the PNG is a perfectly valid decision. The tool reports the size change after conversion so you can weigh size against appearance.
The resolution stays the same
Only the format changes, so the width and height match the original PNG. For enormous Retina screenshots, resizing first with Image Resizer produces an even bigger saving.
If you have a specific size budget, Image Compressor adjusts quality automatically to land under it.
Batch conversion and ZIP download
Add many PNGs and convert them all at the same quality, which fits migrating a documentation site or a manual to WebP in one go.
Filenames keep their stem and swap only the extension (diagram.png becomes diagram.webp), so reference updates can be done mechanically. Download everything as a ZIP when it finishes.
Frequently Asked Questions (FAQ)
Does PNG to WebP keep transparency?
Yes. WebP supports an alpha channel, so transparency in the PNG is preserved in the output.
How much smaller will the files be?
It depends on the content. UI screenshots with a limited palette often drop below half their original size, while photographic PNGs save much less.
Is it safe for images containing text?
Use a high quality setting. WebP is lossy, so low values blur thin strokes and small type. For readable captures, keep the quality at 90 or above.
Can I convert without losing any quality at all?
WebP output here is lossy. If you need pixel-perfect preservation, keep using the PNG.
Does the resolution change?
No. Only the format changes, so the dimensions match the original PNG. Use Image Resizer to change them.
Are my images uploaded to a server?
No. Decoding and WebP encoding happen entirely in your browser via Canvas and a Web Worker.
Can I convert several PNGs at once?
Yes. Add them all, convert in one pass, and download the results as a ZIP.