Short answer
WebP can help web-hosted newsletter pages, but JPG or PNG fallbacks are still safer for many email clients.
Newsletter Image to WebP: Speed Without Broken Previews
WebP can help web-hosted newsletter pages, but JPG or PNG fallbacks are still safer for many email clients.
Why it matters
- Use JPG or PNG when email compatibility matters
- Use WebP for web archive performance
- Keep CTA text readable after compression
What to know
Email workflows lag behind modern website image workflows, so the fastest format is not always the safest format.
For newsletters, separate the email asset from the web archive asset instead of forcing one image to serve every context.
Compression should preserve headlines, CTAs, and product screenshots because email images are often viewed on small screens.