WebP Explained: Pros, Cons, and When to Use It

WebP is Google's image format, and it's been around since 2010. But it's only in the last few years that it's become genuinely practical to use everywhere. If you're still defaulting to JPG and PNG for everything, here's what you should know about WebP — including when it's worth the switch and when it isn't.

What Is WebP?

WebP is an image format developed by Google specifically for the web. It supports both lossy compression (like JPG) and lossless compression (like PNG), plus transparency and animation. The key selling point is file size: WebP images are typically 25-35% smaller than equivalent JPGs and significantly smaller than PNGs.

The Pros

• Smaller files — the most obvious benefit. A 200KB JPG might be 140KB as WebP with no visible quality difference. On image-heavy pages, this adds up fast.
• Transparency support — unlike JPG, WebP handles transparent backgrounds. And unlike PNG, it does so with much smaller file sizes.
• Universal browser support — Chrome, Firefox, Safari, and Edge all support WebP. This wasn't true a few years ago (Safari only added support in 2020), but today it's safe to use everywhere.
• Better quality per byte — at the same file size, WebP generally looks better than JPG. The compression algorithm is more sophisticated, especially at lower quality settings.

The Cons

• Limited desktop app support — while browsers handle WebP fine, many desktop applications still don't. Older versions of Photoshop, most email clients, and many document editors can't open WebP files natively.
• Not ideal for print — print workflows typically expect TIFF, PNG, or high-quality JPG. WebP isn't part of the print ecosystem.
• Lossy by default — while WebP supports lossless mode, most tools export lossy WebP by default. If you need guaranteed pixel-perfect quality, PNG is still the safer choice.
• Encoding speed — WebP encoding is slightly slower than JPG encoding, though this only matters for real-time applications or very large batches.

When to Use WebP

WebP is the clear winner for web-only use cases:

• Website images — product photos, blog images, hero banners. The file size savings directly improve page load speed and Core Web Vitals scores.
• Social media assets — most platforms accept WebP now, and the smaller files upload faster.
• App assets — if you're building a web app, WebP reduces bandwidth costs and improves performance.

When to Stick with JPG or PNG

• Email attachments — many email clients still can't preview WebP inline. JPG is universally safe.
• Documents and presentations — Word, PowerPoint, and Google Docs handle JPG and PNG better than WebP.
• Design workflows — if you're handing files to a designer, PNG or JPG avoids compatibility headaches.
• Archival — for long-term storage, PNG (lossless) or TIFF are more established choices.

Converting To and From WebP

If you need to convert images to WebP for your website, tools like JPG to WebP and PNG to WebP handle it instantly in your browser. Going the other direction — when you've downloaded WebP images and need them in a more compatible format — WebP to JPG and WebP to PNG have you covered.

The Bottom Line

WebP is a genuinely good format that deserves its growing adoption. For anything web-facing, it's usually the best choice. But it's not a universal replacement for JPG and PNG — those formats still have their place in email, print, design, and archival workflows. The practical approach is to use WebP where it shines and convert to JPG or PNG when compatibility matters more than file size.