PNG to WebP Conversion Guide: Why and How

Updated June 2026 · 3 min read

PNG files are perfect for quality, but they can be huge. Converting PNG to WebP can shrink file sizes by 25-35% in lossless mode and up to 90% in lossy mode — while keeping excellent visual quality. Here's how and when to do it.

Why Convert PNG to WebP?

• Website performance: Smaller images = faster page loads = better SEO rankings
• Bandwidth savings: Every visitor downloads less data, saving money on hosting
• Keep transparency: WebP supports alpha transparency just like PNG
• Modern standard: 97% of browsers support WebP natively

When NOT to Convert

• Images you'll edit repeatedly (each lossy re-save degrades quality)
• Archival copies (PNG is guaranteed readable long-term)
• Print design (print workflows use PNG/TIFF, not WebP)