PUBLISHING GUIDE · 5 MIN READ
How to compress images for faster pages and emails
Large images are one of the easiest ways to slow a page down. That hurts reader experience, can reduce search performance and often lowers ad-view quality because the page takes longer to become usable. Compression fixes that when you choose the right balance between dimensions, format and quality.
Resize before you compress
If an image will only be displayed at 1200 pixels wide, there is no reason to keep a 4000-pixel original for web delivery. Reducing dimensions usually saves more than changing the quality slider alone.
Pick the right format
JPEG is usually best for photos. PNG is better for graphics that need crisp edges or transparency. WebP can be efficient too, but your workflow may still require a JPEG or PNG output for compatibility.
Check real readability
Do not judge compression only by zoomed-in inspection. Review the image at the size readers will actually see on a page or in an email. Text inside screenshots and interface elements should remain legible.
Keep a lightweight publishing workflow
For small sites, the best setup is often local compression before upload. That keeps private materials off a third-party server and helps you control both file size and output format.
Image compression FAQ
What is a good JPEG quality starting point?
A useful starting point is around 75 to 85, then review the result visually. The best number depends on the image content.
Should every image be compressed aggressively?
No. Logos, diagrams and screenshots with small text often need a more careful balance than photos.