PNG to WEBP Converter

Convert your PNG images to WebP format for optimized web performance. Maintain transparency while reducing file size.

PNG vs WEBP: Technical Overview

WebP was designed by Google as a single web format that can replace JPEG, PNG and GIF. It supports lossy and lossless compression, a full alpha channel and animation. Its lossy mode is based on VP8 video intra-frame coding, which predicts each block of pixels from its neighbors and encodes only the difference. PNG is lossless and handles transparency well, but its DEFLATE compression is not very efficient for detailed or photographic images, so transparent product photos and illustrations saved as PNG are often very large. WebP's key feature for this conversion is that transparency can be combined with lossy color compression: the color data is compressed like a photo while the alpha mask is stored separately and losslessly. That keeps edges clean while cutting file size dramatically compared with PNG.

Why Convert PNG to WEBP?

Web performance. PNGs are frequently the largest files on a page, especially transparent product shots, hero images and illustrations. Converting them to WebP typically removes most of their weight while keeping the transparent background, which improves loading speed, Core Web Vitals scores and the "Serve images in modern formats" audit in Lighthouse.

Unlike JPG, WebP doesn't force you to give up transparency to get small files, so it's the natural replacement for PNG on websites, in web apps and in Android apps. All current browsers support it, and WordPress, Shopify and most CDNs accept WebP uploads.

What Changes During PNG to WEBP Conversion

Dimensions stay the same and transparency is preserved: CNVRT writes WebP with lossy color compression plus a separate lossless alpha channel, so transparent backgrounds and soft edges remain intact. Because the color data is compressed lossily, the savings on photographic or detailed PNGs are large, often 60–90%. On tiny, flat-color graphics that PNG already compresses well, the WebP may be about the same size, and very fine pixel art can show slight softening. For those, keep the PNG.

PNG vs WEBP: Key Differences

Feature	PNG	WEBP
Compression	Lossless DEFLATE	Lossy color + lossless alpha
Transparency	Full alpha	Full alpha (kept)
Size for detailed images	Large	Often 60–90% smaller
Animation	APNG (limited)	Yes
Browser support	Universal	All current browsers
Best for	Editing, pixel-perfect graphics	Web delivery, apps

When to Convert PNG to WEBP

Shrinking transparent product photos for faster online stores

Replacing heavy PNG hero images and illustrations on landing pages

Passing the "Serve images in modern formats" check in PageSpeed Insights

Reducing Android and web app asset sizes

Lightening image-heavy blog posts and documentation

Cutting CDN bandwidth for high-traffic sites

How to Convert PNG to WEBP

Click 'Select File' and choose your PNG image
Our system prepares your file for conversion
Click 'Convert to WebP' button
Wait for the conversion to complete
Download your optimized WebP file

Processing typically takes a few seconds. For larger files, conversion may take slightly longer. All conversions are free with no daily limits.

Tips for Best PNG to WEBP Results

1.Keep your PNGs as masters for editing; use WebP as the published version.
2.For pixel art, tiny icons and screenshots of text, compare both files: PNG may be as small and slightly sharper.
3.Resize images to their display size before converting for the biggest savings.
4.If you need to support very old browsers, serve WebP in a <picture> element with the PNG as fallback.

Benefits of Converting PNG to WEBP

Reduce file size while keeping transparency
Better compression than PNG
Ideal for modern web development
Lossless or lossy compression options
Supported by all modern browsers

PNG to WEBP — Frequently Asked Questions

Does WebP keep the transparent background?

Yes. The transparency is stored in a separate lossless alpha channel, so transparent areas and soft edges are preserved.

How much smaller is WebP than PNG?

For photos and detailed graphics, often 60–90% smaller. For small flat-color graphics that PNG already compresses well, the difference can be minimal.

Is the conversion lossless?

The transparency is lossless; the color data uses high-quality lossy compression, which is what makes the file so much smaller. At normal viewing sizes the images look the same.

Can every browser show WebP?

All current versions of Chrome, Edge, Firefox, Opera and Safari (14 and later) display WebP, on desktop and mobile.

Can I convert the WebP back to PNG later?

Yes, but the result will match the WebP, not your original PNG. Keep the original PNG if you might need it.