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Why PNG to WebP?
PNG and WebP are different formats. Both can carry transparency, but their compression, metadata and application support differ. Keep the original PNG and evaluate a WebP copy for the intended use:
- Compare file sizes because the result depends on image content and the browser encoder.
- Transparency support — preview alpha edges after Canvas conversion; pixel and metadata identity is not guaranteed.
- Check your destination — current mainstream browsers support WebP, but an older editor, email client or upload service may not.
- Measure page loading — a smaller suitable asset can reduce transfer size; a file extension alone does not improve Core Web Vitals or search rankings.
Perfect For
- Logos — inspect sharp edges and brand colors before choosing the converted copy.
- Icons — compare the encoded size and inspect small lettering before replacing a PNG.
- Product images —E-commerce product photos on transparent backgrounds
- Overlays and stickers —Chat stickers, watermarks, and decorative elements
How to Convert
- Open the PNG to WebP tool
- Upload your PNG image
- Convert the selected static images locally. The batch allows up to 20 files, 20 MiB per file and 120 MiB total, with additional pixel limits based on the device.
- Download the converted WebP and compare it with the source PNG.
Before replacing assets: compare dimensions, decoded appearance, transparency and byte size. Use the format that fits the asset and destination; there is no need to convert every PNG. Keep original sources for editing.
Lossless vs Lossy WebP
The WebP format supports lossy and lossless encoding, but this tool exposes only its fixed-quality Canvas output, not a lossless-mode switch. Quality 0.90 is an encoder setting, not a fidelity percentage. For exact source preservation, retain your original file; animation and original metadata are not preserved by this static conversion workflow.
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.
Privacy
All processing happens in your browser. Your images never leave your device.