WebP vs PNG vs JPG in 2026 — Which Format to Use and Why

The TL;DR

Short answer: use WebP for everything on the web. Keep PNG originals for editing. Use JPG only when targeting ancient platforms that still don't support WebP.

Why WebP won

Google released WebP in 2010. It took a decade of fighting with Apple's reluctance, but Safari 14 (2020) finally added support, and today WebP works on 97% of the web.

Three things make WebP better than both PNG and JPG:

1. Better compression than JPG at equal quality — typically 25-35% smaller files.
2. Transparency support like PNG, but at a fraction of the size.
3. Both lossy and lossless modes — one format for every use case.

For a typical product photo, WebP at quality 80 is visually indistinguishable from JPG at quality 90 and comes out 30% smaller. For a logo with transparency, WebP-lossless beats PNG by 20-25%.

When to still use PNG

• Source files you'll edit. PNG is lossless. Every time you re-save a JPG or a lossy WebP, quality degrades. Keep originals as PNG.
• Screenshots with text. Lossy formats chew up anti-aliased text edges. PNG preserves them.
• Pixel-perfect UI assets where nothing can shift.
• Design system icons that might need 1:1 colour fidelity.

For all of those, convert to WebP only for the final web deploy — with a WebP converter — and keep the PNG master.

When to still use JPG

Almost never in 2026. The only remaining cases:

• Email clients with zero WebP support (still a long tail)
• Very old CMS or print workflows that reject WebP
• Compatibility with a partner's asset pipeline

If someone sends you a WebP and you need JPG, use a WebP to JPG converter. Going the other way — JPG to WebP — always saves bandwidth.

Real benchmarks

We converted a set of common web images at sensible quality settings:

Translation: swapping JPG for WebP saved 30-40% bandwidth at better visual quality. Swapping PNG logos for lossless WebP saved 70%+.

What about AVIF?

AVIF is better than WebP — smaller files, wider colour gamut, HDR support. But tooling is still catching up (Safari 16+, Firefox 93+). The pragmatic 2026 stack:

<picture>
  <source srcset="image.avif" type="image/avif">
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="fallback">
</picture>

That serves AVIF to browsers that support it, WebP to the rest, and JPG as a safety net. Coverage: ~100%.

Don't forget SVG

For icons, logos, and diagrams, SVG beats every raster format. It's text, scales infinitely, and a hand-drawn 100-line SVG is often smaller than a 32×32 PNG icon. Run your SVGs through an SVG optimizer to strip editor metadata — typical savings are 50%+.

The 2026 defaults

• Photos on the web: WebP (lossy, quality 75-85)
• Transparency on the web: WebP (lossless)
• Icons and logos: SVG (optimized)
• Photos on CMS/email: JPG (quality 85)
• Design sources: PNG, always

Convert once on publish, not on every page view. Cache aggressively. And always run your images through compression before shipping.