How to Convert PNG to WEBP — Smaller Files, Same Quality

PNG files are great for quality, but they eat up bandwidth. WEBP is a modern image format developed by Google that delivers the same visual quality as PNG at dramatically smaller file sizes.

If you're using PNG screenshots or graphics on your website, converting to WEBP can cut your image payload by 50–90% — faster load times, better Core Web Vitals, happier visitors.

Why WEBP?

  • Smaller file size — Typically 25–35% smaller than equivalent PNG at similar visual quality
  • Lossy and lossless options — Lossy WEBP for photos, lossless WEBP for graphics
  • Alpha channel support — Like PNG, WEBP supports transparent backgrounds
  • Universal browser support — Works in Chrome, Firefox, Safari, Edge (even IE11 supports lossy WEBP)

How to Convert PNG to WEBP

  1. Go to ImageConvert
  2. Upload your PNG file
  3. Choose WEBP as the output format
  4. Download your converted file

The conversion process supports both lossy and lossless WEBP output, depending on your use case.

When to Use Lossy vs Lossless WEBP

Lossy WEBP — Best for photographs and complex images where some quality reduction is acceptable in exchange for massive file size savings (50–90% smaller).

Lossless WEBP — Best for screenshots, diagrams, and graphics where every pixel matters. Still smaller than PNG, just less aggressive compression.

File Size Comparison

Format Typical screenshot (800×600) Typical photo (4000×3000)
PNG ~400 KB ~15 MB
WEBP (lossy) ~50 KB ~1.5 MB
WEBP (lossless) ~150 KB ~5 MB

Using WEBP on Your Website

Modern browsers automatically handle WEBP images. Just upload your converted files:

<picture>
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Description">
</picture>

This approach serves WEBP to browsers that support it and falls back to JPG/PNG for older browsers.

Is WEBP Right for Your Project?

WEBP is ideal when:

  • You're optimizing website images for speed
  • You have lots of screenshots or product photos
  • You need transparency (lossy or lossless)
  • You're targeting modern audiences

PNG is still better when:

  • You need maximum compatibility with very old browsers
  • You're working with images that will be edited multiple times (lossy formats degrade)
  • You're sending files to print production (PNG preserves more detail)