The right image format for your website in 2026 depends on the content type, your browser targets, and whether you prioritize encoding speed or maximum compression. This guide gives you clear rules for each common scenario.
The 2026 browser support landscape
| Format | Chrome | Firefox | Safari | Edge | Global support |
|---|---|---|---|---|---|
| JPEG | ✅ | ✅ | ✅ | ✅ | 100% |
| PNG | ✅ | ✅ | ✅ | ✅ | 100% |
| WebP | ✅ | ✅ | ✅ | ✅ | 97%+ |
| AVIF | ✅ | ✅ | ✅ (16+) | ✅ | 93%+ |
| JPEG XL | ✅ (flag) | ✅ | ✅ (17+) | ✅ (flag) | ~70% |
Recommended formats by use case
Photographs and hero images
Primary: AVIF. Serve AVIF to the 93%+ of browsers that support it, WebP as fallback, JPEG as last resort. Use the <picture> element.
Example file size: a 1280×720 hero photo is ~180 KB as JPEG, ~120 KB as WebP, ~70 KB as AVIF — at equivalent visual quality.
Logos, icons, and graphics
Primary: SVG (when possible) or WebP/AVIF for raster graphics. PNG for anything that needs universal compatibility or exact pixel output. Avoid JPEG for graphics with flat colors or text.
Thumbnails and catalog images
WebP is the practical choice here — fast to encode, widely supported, good compression. If you process thumbnails at upload time, WebP encoding is fast enough for real-time processing.
User-uploaded content
Accept any format on upload, convert to WebP server-side (or in-browser with Picovert). Strip EXIF data for privacy. Serve WebP with JPEG fallback for maximum compatibility.
Animations
Avoid GIF for web pages. Use MP4/WebM with autoplay loop muted playsinline instead — 5–20× smaller. Use animated WebP for messaging contexts where GIF is expected.
The complete decision tree
- Photo, no transparency, static? → AVIF (fallback: WebP → JPEG)
- Logo/icon, vector possible? → SVG
- Logo/icon, raster required? → WebP with PNG fallback
- Screenshot with text? → PNG or lossless WebP
- Animation? → MP4 (web), animated WebP (messaging)
- Thumbnail in CMS? → WebP
- Email? → JPEG (photos), PNG (graphics)
Performance impact
Image weight is typically the largest contributor to page load time. Google's Core Web Vitals (LCP in particular) are directly affected by image format choices. Switching from JPEG to AVIF on a typical landing page can reduce image payload by 40–60% with zero visible quality loss, which translates to faster LCP scores.
How to convert
Picovert converts any image to WebP or AVIF (plus JPEG, PNG, BMP, TIFF) in your browser — no upload, unlimited batch, free. Use it to prepare images before uploading to your site or CMS.