WebP vs JPG: Which Format Should You Use in 2026?

Choosing the right image format can significantly affect your site’s speed, user experience, and compatibility. In 2026, the two formats you’ll use most often are WebP and JPG. This guide compares them so you can decide when to use each.

WebP vs JPG at a glance

| | WebP | JPG | |--|------|-----| | File size | Typically 25–35% smaller at similar quality | Larger for same visual quality | | Quality | Excellent (lossy and lossless) | Very good (lossy only) | | Transparency | Yes (alpha channel) | No | | Browser support | All modern browsers (Chrome, Safari, Firefox, Edge) | Universal | | Email support | Limited (many clients don’t show WebP) | Widely supported |

When to use WebP

Use WebP when you control the environment and want the best balance of size and quality:

Modern websites — Reduces page weight and improves Core Web Vitals.
Apps (web and mobile) — All major platforms support WebP.
Google PageSpeed / performance — Tools often recommend WebP for images.
When you need transparency — WebP supports an alpha channel; JPG does not.

If your stack supports it (CDN, CMS, or build step), serving WebP to supporting clients and falling back to JPG is a solid strategy.

When to use JPG

Use JPG when compatibility or ecosystem matters more than size:

Email — Many clients don’t display WebP; JPG is safe.
Legacy systems — Older apps or workflows may only accept JPG.
Maximum compatibility — If you can’t guarantee WebP support, JPG is the safe default.
Print or external use — Some print and design tools still expect JPG.

File size difference (real numbers)

At comparable visual quality, WebP usually produces files about 25–35% smaller than JPG. The exact gain depends on the image (photos vs graphics, amount of detail). In practice, converting a 500 KB JPG to WebP often yields roughly 325–375 KB. That’s a meaningful saving for pages with many images.

Browser support

All major browsers have supported WebP for years:

Chrome — Since 2010.
Firefox — Since 2019.
Edge — Full support in Chromium-based Edge.
Safari — Since 2020 (macOS Big Sur, iOS 14).

So for web and app use in 2026, you can rely on WebP. The main exception is email, where client support is still inconsistent.

Conclusion

Use WebP for websites and apps when you can; you’ll get smaller files and (optionally) transparency.
Use JPG for email, legacy systems, and when you need the widest possible compatibility.

If you’re ready to try WebP, you can convert your images in the browser with no upload to a server: use our free Convert to WebP tool.