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Private, browser-based image conversion

Convert PNG to WebP or WebP to PNG

Fast, clean image conversion for websites, blogs, design work, and everyday files. Batch-process images in your browser with transparency support and adjustable WebP quality.

Files stay on your device No account required Batch conversion Free to use
Image converter Choose your conversion direction
Local processing
Drop PNG images here Up to 20 files • 25 MB each • processed locally in your browser Choose images
Higher quality usually means a larger WebP file.
Your files stay on your device
Why use WebpWhirl?

Fast image conversion without unnecessary uploads

The tool uses your browser's built-in image and Canvas APIs, giving you a simple workflow for converting common web-image formats.

Local processing

Conversion runs in your browser, so the converter does not need to send source images to a conversion server.

Batch workflow

Add several PNG or WebP files, process them sequentially, compare file sizes, and download each result.

Quality control

PNG to WebP includes an adjustable quality setting, while WebP to PNG creates PNG output without another lossy quality step.

Three simple steps

How to convert PNG and WebP images

Choose the direction, add your files, then convert and download.

01

Choose a format

Select PNG → WebP for web-friendly output or WebP → PNG when you need PNG compatibility.

02

Add images

Drag and drop files or choose them from your device. The tool checks the actual file signature before conversion.

03

Convert and download

Run the batch, compare the resulting file sizes, and download each converted image.

Format guide

PNG vs WebP: which format should you use?

Both formats support transparency, but they fit different workflows.

PNG

Best when lossless compatibility matters

PNG is widely used for screenshots, interface graphics, logos, and images where lossless storage or broad editing compatibility is useful.

WebP

Useful for many web-image workflows

WebP can produce smaller files for many web images while supporting transparency, helping reduce the amount of image data transferred on a page.

FAQ

Frequently asked questions

Important details about privacy, transparency, quality, and output size.

Are my images uploaded to a server?+

No conversion server is used by this tool. Images are decoded and converted in your browser.

Does PNG to WebP preserve transparency?+

Yes. When the browser supports WebP encoding, transparent areas are preserved through the Canvas conversion workflow.

Does WebP to PNG reduce quality?+

PNG output is lossless. The decoded WebP pixels are written into a PNG file without applying an additional lossy quality setting.

Why is my WebP sometimes larger than the PNG?+

Simple graphics, already optimized images, or very high WebP quality settings can produce a larger output. Lower the WebP quality setting and compare the result.

Ready when you are

Convert your next image in your browser

Jump back to the converter and choose PNG → WebP or WebP → PNG.

Open converter