PNG to WebP Converter

Why convert PNG to WebP?

WebP files are on average 26% smaller than lossless PNG and 25–35% smaller than JPEG at the same visual quality. For websites and web apps, switching images from PNG to WebP directly improves page speed, reduces bandwidth costs, and boosts Google PageSpeed and Core Web Vitals scores — all of which affect search rankings. All modern browsers (Chrome, Firefox, Safari, Edge) support WebP natively.

Frequently asked questions

Does PNG to WebP lose transparency?

WebP supports transparency (alpha channel) just like PNG. However, this converter outputs WebP with the white background applied (lossy WebP mode), which gives maximum file size reduction. If you need to preserve transparency in the output WebP, you currently need a tool that supports lossless WebP encoding — browser Canvas API outputs lossy WebP without alpha. For transparent images, keeping PNG is often the better choice unless you specifically need WebP with transparency.

How much smaller is WebP than PNG?

On average, lossy WebP is 26% smaller than lossless PNG at equivalent perceptual quality. For photographs, the savings are even larger — WebP typically achieves 30–40% smaller files than PNG because PNG's lossless compression is inefficient for photo content. Screenshots and graphics with flat colors see smaller savings (10–20%).

Is WebP supported everywhere?

Yes, as of 2024. Chrome, Firefox, Safari (since macOS Big Sur / iOS 14), Edge, and Opera all support WebP natively. WebP is now safe to use on any modern website without fallbacks. The only exception is very old browsers (IE11, Safari pre-2020) which are below 2% of global traffic.

Should I use WebP instead of PNG for my website?

For photographs and complex images displayed on websites, yes — WebP offers significant size savings. For images that need transparency and lossless quality (logos, icons, UI elements), stay with PNG or use lossless WebP. For a quick win, convert all your background photos and hero images to WebP first — these are typically the largest files on a page.

Can I convert multiple PNG files to WebP at once?

Yes — drop multiple PNG files onto the upload area at once. All convert and appear in the results list for individual download.

Will the quality look different after PNG to WebP conversion?

At 80%+ quality the difference is invisible at normal viewing sizes on screen. WebP's compression algorithm is more efficient than JPEG, so it achieves the same visual result at a lower file size. Use the quality slider to find the right trade-off for your specific images.

How do I use WebP images in HTML?

Use the <picture> element for maximum compatibility, or simply use <img src="image.webp"> for modern sites. For WordPress, upload WebP files directly to the Media Library (supported since WordPress 5.8). For maximum compatibility with older browsers, use the picture element with a JPEG fallback: <source srcset="image.webp" type="image/webp"> with <img src="image.jpg"> as fallback.

Why convert PNG to WebP?

WebP is on average 26% smaller than lossless PNG at the same visual quality — and for photographs stored as PNG, the savings can reach 40–60% because WebP's compression handles photographic content far more efficiently than PNG. Smaller images load faster, use less bandwidth, and improve Google PageSpeed scores. Switching hero images and product photos from PNG to WebP is one of the highest-impact web performance optimizations available.

Does PNG to WebP preserve transparency?

WebP fully supports alpha transparency, and lossless WebP with transparency is approximately 26% smaller than an equivalent PNG. However, this converter uses lossy WebP output (via the browser Canvas API), which applies a white background to transparent areas for maximum compression. If you need to preserve a transparent background in WebP, you currently need a server-side tool that supports lossless WebP encoding. For transparent images that will stay on the web, PNG remains a reliable choice.

Is WebP lossless?

WebP supports both lossless and lossy modes. Lossless WebP produces pixel-perfect output with no quality loss, and is typically 26% smaller than lossless PNG. Lossy WebP (the mode used by most web tools) achieves 25–35% smaller files than JPEG at the same perceptual quality. The quality slider in this tool controls the lossy compression level — 80% is the recommended starting point for web images.

How do I use WebP images in HTML?

The simplest method is <img src="image.webp"> — supported by all modern browsers. For sites that must support Internet Explorer or Safari before 2020, use the <picture> element: list a <source type="image/webp" srcset="image.webp"> first, followed by <img src="image.png"> as the fallback. Browsers load the first source they support and ignore the rest, so modern browsers get WebP while legacy browsers get PNG automatically.