How much can I save by converting JPEG to WebP?

JPEG to WebP typically saves about 30% file size, sometimes more depending on quality.

What is the best format for compression?

AVIF offers the best compression (up to 50% over JPEG), followed by WebP. SVG is best for vector graphics.

Does lazy loading reduce bandwidth?

Yes, lazy loading can reduce initial page weight by 20–30% by deferring offscreen images.

📸 Image Optimization Calculator

Estimate real savings from compression, format conversion & lazy loading

Image dimensions (px)

Format

Quality level

Number of images per page

Monthly pageviews

Lazy loading enabled

📦 Est. file size (per image) —

🖼️ Total page weight (images) —

⚡ Bandwidth / month —

💰 CDN cost savings (est.) —

🔄 Format conversion savings —

🛌 Lazy loading savings —

* CDN cost assumes $0.08/GB. Savings relative to original (JPEG/PNG).

📊 Format comparison (estimated)

per image

Format	Est. size	vs JPEG	vs PNG	Quality range

* SVG size is highly variable; shown estimate for simple vector. Actual savings depend on content.

Made by one person, free to use.

I started krzen in April 2026 and have built the image compressor plus 25 page-speed tools since. I pay for the domain and the hours myself. A small tip keeps it going. The tools stay free either way.

Michael

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