A complete, practical comparison of the two most common web image formats — with real data on file sizes, quality, and compatibility.
Short answer: Use WebP for your website (faster loading), use JPG when sharing images with others (universal compatibility). The good news? You can convert between them instantly with PNGtoJPG.
WebP is an image format developed by Google and released in 2010. It uses both lossy and lossless compression techniques derived from the VP8 video codec. WebP images are typically 25–35% smaller than JPG at equivalent visual quality, making them ideal for websites where page speed matters.
As of 2026, WebP is supported by all major modern browsers — Chrome, Firefox, Safari (since version 14), Edge, and Opera. This near-universal browser support has led most major websites to adopt WebP as their primary image format.
JPG (or JPEG — Joint Photographic Experts Group) is the most widely used image format in the world, created in 1992. JPG uses lossy compression to reduce file sizes significantly while maintaining acceptable image quality. Despite being over 30 years old, JPG remains dominant because of its absolute universal compatibility — every device, app, and system on earth can open a JPG file.
In real-world testing, WebP consistently outperforms JPG in compression efficiency:
| Image Type | JPG (85% quality) | WebP (equivalent) | WebP Savings |
|---|---|---|---|
| Portrait photo (3000×2000) | 2.4 MB | 1.7 MB | ~29% |
| Landscape photo (1920×1080) | 890 KB | 620 KB | ~30% |
| Product photo (800×800) | 145 KB | 98 KB | ~32% |
| Screenshot (1440×900) | 320 KB | 195 KB | ~39% |
These savings add up significantly for websites serving thousands of images. Google's own research shows WebP reduces image payload by an average of 30% compared to JPG.
At equivalent file sizes, WebP produces noticeably better image quality than JPG. This is most visible at lower quality settings (higher compression). JPG starts showing blocky artifacts around edges and smooth gradients at lower quality settings, while WebP maintains better detail.
At high quality settings (85%+), both formats look excellent and the difference is imperceptible to most viewers.
| Platform/App | WebP | JPG |
|---|---|---|
| Chrome, Firefox, Edge | ✓ Full support | ✓ Full support |
| Safari (iOS/macOS) | ✓ Since Safari 14 | ✓ Full support |
| Windows Photo Viewer | ✗ Not supported | ✓ Full support |
| macOS Preview | ✓ macOS 11+ | ✓ Full support |
| Photoshop | ✓ Recent versions | ✓ Full support |
| Email clients (Outlook) | ✗ Often blocked | ✓ Full support |
| WhatsApp, Telegram | Limited | ✓ Universal |
| Printers/print services | ✗ Limited | ✓ Universal |
| Social media upload | Most platforms | ✓ All platforms |
PNGtoJPG makes it trivial to convert between formats:
All conversion happens in your browser — your files never leave your device.
For websites: Use WebP. The file size savings improve page speed, which benefits both user experience and SEO rankings.
For sharing images with other people: Use JPG. It works everywhere, on every device, in every app — guaranteed.
The good news: you don't have to choose forever. Convert WebP to JPG (or JPG to WebP) instantly whenever you need to with PNGtoJPG — free, no upload, no registration.
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