PNG vs WebP: which format should you use?

PNG has been the go-to lossless format for two decades. WebP is Google's modern successor, offering both lossy and lossless modes with dramatically smaller files. If your target audience is on browsers from the last five years, WebP is almost always the better choice for web delivery. PNG still wins for legacy compatibility, print pipelines, and any tool that hasn't added WebP support yet.

Head-to-head comparison

Aspect	PNG	WebP
Compression modes	Lossless only	Lossy or lossless
Typical file size	Large (10-25 MB from camera)	25-35% smaller than PNG at same quality
Transparency (alpha)	Yes	Yes
Browser support	Universal (since 1996)	~97% of modern browsers (Chrome, Firefox, Safari, Edge)
Design tool support	Universal	Growing — Figma yes, older Photoshop no
Animation	No	Yes (like a GIF replacement)
Best for	Editing sources, legacy support	Modern web delivery
Age	1996	2010

When to use each

Use PNG when

You're editing the image and need a lossless source
The image will pass through tools that don't support WebP
You need it to open on legacy systems (very old browsers, some enterprise software)
You're preparing for print — PNG plays nicer with print pipelines

Use WebP when

The image is for a modern website and page-weight matters
You're serving hero images, thumbnails, or gallery photos to visitors
You'd have used a GIF but want proper compression
You care about Core Web Vitals (LCP is directly affected by image size)

The verdict

For any new website in 2026, WebP is the right default — you'll cut image weight roughly a third with zero visible quality loss. Keep PNG as your editing master, and export WebP for delivery. Don't switch existing PNGs to WebP wholesale unless page speed is actively a problem; the compatibility trade-off usually isn't worth the migration work.

Frequently asked questions

Does WebP support transparency like PNG?

Yes. WebP supports an 8-bit alpha channel in both lossy and lossless modes. A WebP with transparency is typically 25–35% smaller than the equivalent PNG. This makes WebP a strong replacement for PNG when used for logos, icons, and product images on the web.

Can I use WebP in emails?

Not reliably. Most email clients (Gmail, Outlook, Apple Mail) still don't render WebP inline. Use PNG or JPG for email images. WebP is best suited for web delivery where you control the rendering environment through the browser.

Does converting PNG to WebP lose quality?

It depends on the mode. WebP lossless mode preserves every pixel exactly — no quality loss, just a smaller file. WebP lossy mode discards some data for even smaller files, similar to JPG. For screenshots and graphics, use lossless WebP. For photographs, lossy WebP at quality 80 is visually indistinguishable from the PNG source.

Which browsers don't support WebP?

As of 2026, all major browsers support WebP: Chrome (since 2014), Firefox (since 2019), Safari (since 2020/macOS Big Sur), and Edge. The only holdouts are very old browser versions and some niche enterprise software. If you need to support IE11 or Safari 13 and earlier, serve PNG as a fallback with the <picture> element.

Does WebP affect SEO?

Indirectly, yes. Smaller image files improve page load speed, which is a Core Web Vital ranking factor (LCP). Google Search can index WebP images and display them in image search results. Using WebP via the <picture> element with a PNG/JPG fallback is the recommended approach — it improves performance without sacrificing compatibility.