How to Compress Images for a Faster Website (Simple Checklist)

Images are often the biggest files on a website. If your pages feel slow, image size is one of the first things to fix.

This guide gives you a clear checklist you can follow in 10–15 minutes.

What “compressing images” really means

Compression reduces the file size of an image.

That helps your website:

• load faster
• use less data on mobile
• feel smoother for visitors

Good compression keeps the image looking the same (or almost the same) to the human eye.

The simplest checklist (start here)

1) Use the right dimensions

Don’t upload a 4000px wide photo if your site shows it at 1200px.

Rule of thumb: resize to the maximum display width on your site.

2) Compress before you upload

If you upload huge images, many platforms will compress them automatically, but you lose control over the final quality.

Compressing yourself first gives you:

• predictable results
• smaller files
• fewer surprises

3) Pick the right format

• JPEG: great for photos
• PNG: great for logos and images with text
• WebP: great for modern websites (smaller files)

If you’re unsure, start with JPEG for photos.

A quick target for file sizes

These targets work well for many sites:

• Hero images: 150–400 KB
• Blog images: 80–250 KB
• Thumbnails: 20–80 KB

It’s not a strict rule. The goal is “fast enough” without ugly quality loss.

How to optimize images in one minute

1. Open the optimizer tool
2. Upload 1 or more images
3. Download the optimized files

That’s it.

If you want to go one step further, resize first, then optimize.

Common mistakes to avoid

• Optimizing the same file many times: each save can reduce quality.
• Over-compressing: if faces and text look blocky, increase quality.
• Forgetting mobile: slow images hurt mobile visitors the most.

Summary

If you do only two things, do these:

1. Resize to the correct dimensions
2. Optimize the file size before uploading

Try it now:

• Optimize images: Optimize
• Resize first if needed: Resize