How to Reduce Image Size for Faster Websites

Large images are one of the most common reasons pages feel slow. The fastest fix is to resize images to the real display dimensions, then compress them before uploading.

Resize before compressing

If a blog image displays at 900 pixels wide, uploading a 4000 pixel photo wastes bandwidth. Resize first so the browser does less work and visitors download fewer bytes.

Choose the right format

Use JPEG for photos, PNG for graphics that need transparency, and WebP when your publishing platform supports it. WebP usually gives smaller files at similar visual quality.

Use descriptive filenames and alt text

A filename like compress-pdf-tool-screenshot.webp is more useful than IMG_1024.jpg. Add accurate alt text in your CMS so users and search engines understand the image.

Website image checklist

• Resize images to the largest size they actually display.
• Compress images before uploading them to the website.
• Use WebP for smaller files when possible.
• Set image width and height to reduce layout shift.