The short answer
For most website images, WebP wins on file size at equivalent quality. But each format still has a job it’s genuinely better at, so “always use WebP” isn’t quite right.
Understanding Image Format Trade-offs
The choice between image formats comes down to three core factors: file size, visual quality, and browser/software support. For a small business managing website performance and storage costs, this matters directly to your bottom line. A website that loads 30% faster can see measurable improvements in conversion rates—studies show that each 100ms of latency can reduce conversions by roughly 1%.
Real-world impact on your business
Consider a typical e-commerce product page with 8 product images at 1200×1200 pixels:
- JPG format: ~180KB per image = 1.44MB total
- PNG format: ~320KB per image = 2.56MB total
- WebP format: ~125KB per image = 1MB total
On a page load with 50,000 monthly visitors, that 440KB difference per session adds up to roughly 22GB of bandwidth monthly—which translates to real hosting costs and slower perceived performance for visitors on mobile or slower connections.
JPG: Best for photographs and broad compatibility
JPG uses lossy compression, meaning it discards some image data to reduce file size. For photographs—which contain millions of color gradations—this invisible loss is acceptable. You won’t notice the difference between a 95% quality JPG and the original photo, but you’ll save 60-75% in file size.
When JPG makes sense
- Email attachments: JPG is universally supported across all email clients and devices
- Product photography: For photos of physical goods, the quality loss is imperceptible to customers
- Print workflows: Professional print vendors typically require JPG or TIFF files, not WebP
- Legacy systems: Older software, CMS platforms, or devices that haven’t been updated in 5+ years
- Broad audience reach: If your analytics show significant traffic from older browsers or emerging markets with less modern device penetration
JPG limitations
JPG cannot handle transparency, so you’ll see a solid background behind any transparent areas. It also creates visible compression artifacts (blocky patterns) around sharp edges, making it poor for logos, icons, or any graphic with hard lines.
PNG: Essential for graphics and transparency
PNG uses lossless compression, preserving every pixel exactly. This makes it ideal for images where quality loss is visible: logos, icons, screenshots, charts, and any image with transparent areas.
When PNG is the right choice
- Logo files: Logos need pixel-perfect quality and often require transparency
- Icons and UI elements: Compression artifacts around sharp edges are visible and unacceptable
- Screenshots: Text and UI elements show compression damage in JPG format
- Charts and infographics: Flat colors and sharp lines benefit from lossless compression
- Images requiring transparency: Drop shadows, PNG badges, product images with transparent backgrounds
PNG trade-offs
PNG files are typically 40-60% larger than equivalent JPGs because they preserve all image data. This matters when serving thousands of images monthly. A PNG icon at 50KB versus a JPG at 30KB doesn’t seem significant until you’re loading 100 icons per page across 100,000 monthly visitors—that’s an extra 2GB of bandwidth monthly.
WebP: The modern standard for web performance
WebP, developed by Google, supports both lossy and lossless compression plus transparency. In testing, WebP produces files roughly 25-34% smaller than JPG and 26% smaller than PNG at visually identical quality.
WebP advantages for your business
- Smaller files: A product photo that’s 180KB in JPG might be 130KB in WebP—meaningful at scale
- Faster page loads: Directly improves SEO rankings and conversion rates
- Reduced hosting costs: Less bandwidth consumed means lower hosting bills
- Flexibility: Works for photos (lossy), graphics (lossless), and transparency (both modes)
- Broad browser support: Over 96% of browsers in active use support WebP as of 2026
Real adoption timeline
WebP support hit critical mass around 2020-2021. Your analytics likely show that 93-97% of visitors can view WebP natively. The remaining 3-7% are typically older Android devices, outdated browsers, or users in regions with slower device upgrade cycles.
When you’d still choose JPG or PNG over WebP
- Email marketing: Some email clients (notably older versions of Outlook) don’t support WebP reliably
- Print production: Professional printers expect JPG, PNG, or TIFF files
- Internal/legacy systems: Older CMS platforms, document management software, or hardware that predates 2016
- Extreme compatibility needs: If analytics show 5%+ traffic from unsupported browsers, serving WebP alone might hurt UX
The practical approach for small businesses
Don’t choose one format—use a hybrid strategy:
- Serve WebP as primary for all website images (photos, product shots, graphics)
- Provide JPG fallbacks for the small percentage of browsers without WebP support using the HTML
<picture>element - Use PNG only for images requiring transparency or sharp graphics where WebP lossless quality matters
- Keep originals archived in lossless format for future conversions, print needs, or legacy system requirements
This approach captures 96%+ of performance gains while maintaining compatibility with your entire audience, typically increasing page speed by 20-30% compared to JPG-only approaches.