PNG to WebP
Convert PNG images to WebP while keeping transparent areas. Compare the output size and appearance before replacing your original. Files are processed in your browser.
Drop your PNG images here
or browse your device — select up to 20 images
Static PNG · 20 MiB per file · Device memory limits apply
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Converted Images
How it works
Three simple steps – everything happens in your browser.
Select PNG images
Choose the PNG files you need; remove unwanted files before conversion.
Click convert
Each image is converted to WebP format with transparency preserved.
Download WebP files
Download individually or as a ZIP. Compare the actual file sizes and inspect fine edges.
Why choose ToolKnit PNG to WebP Converter?
Compare output size
Create a WebP copy with transparency, then compare its size and appearance. The result depends on the source and browser encoder; no fixed savings are promised.
Transparency Preserved
WebP supports alpha channel transparency just like PNG – your logos, icons, and graphics keep their transparent backgrounds.
Check destination support
Current mainstream browsers support WebP. Check the editor, upload form or email client where you will use it.
Local file processing
Selected images are converted locally. Normal page resources and site analytics still use the network.
Pro Tips
- ●This converter uses lossy Canvas WebP at quality 0.90; it does not offer a lossless switch.
- ●Transparency does not mean identical colors. Inspect text, edges and gradients at the intended display size.
- ●Some small PNG graphics become larger as WebP. Compare bytes before replacing a website asset.
- ●Keep the source PNG for editing, exact source preservation and applications that do not accept WebP.
Frequently Asked Questions
PNG uses lossless compression. WebP supports lossy and lossless modes as a format, but this converter uses fixed-quality Canvas WebP output at 0.90. Transparency can be retained; original metadata and exact pixel identity are not guaranteed.
Yes, the current Canvas output is lossy. There is no lossless-mode switch. Quality 0.90 is not a percentage of preserved detail; inspect text, edges and gradients and keep the source PNG.
Yes. You can upload and convert multiple PNG images in one go. All converted WebP files are packaged into a ZIP for convenient download.
Current mainstream browsers support WebP, but older apps and upload services may not. Test the actual destination. A format change alone does not guarantee faster page loading or higher search rankings.
Conversion runs locally on selected images. Offline use requires the page and dependencies to be cached and retained. Site analytics, preferences and asset downloads are separate from image conversion.
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A transparent-image conversion you can verify
This original ToolKnit practice graphic contains solid shapes, a half-transparent circle and empty space. It is 320 × 240 pixels; the checkerboard below is a page background, not part of the file.
| Input bytes | Output bytes | Decoded dimensions | Alpha values |
|---|---|---|---|
| 2,903 | 3,340 | 320 × 240 | All matched this sample |
The WebP was larger than the PNG in this test, and opaque RGB pixels changed. Quality 0.90 is lossy, not 90% identical pixels. Transparency survived, but that alone does not make WebP the better choice for every graphic.
The files contain no customer artwork. We also converted a second 64 × 48 image in the same batch. These are reproducible checks, not average compression savings or a guarantee for every browser. Metadata such as EXIF, GPS and ICC profiles is not retained.
Have an Illustrator source instead of a raster image? Render its PDF-compatible artwork to PNG first. Then resize the PNG to the actual display dimensions before choosing a web format.