July 4, 2026
How to Optimize Images for Your Website (Faster Loading)
If people say your site is slow, the culprit is usually heavy images. Optimize them before uploading and loading gets noticeably faster.
Visitors leave when a page is even a few seconds slow — and most of a page’s weight is images. Upload full-size originals and each one is several megabytes, slowing loads and burning mobile data. The fix is two steps: match the pixels to the display size, then compress.
1. Resize to the display size
There’s no reason to serve a 4000px original where it shows at 600px. In the image resizer, set the width to how it’s actually used. Rough guide:
- Large in-body images: 1200–1600px wide
- Product thumbnails / cards: 600–800px wide
- Full-width banners: 1920px wide
2. Compress the file
Then reduce the size with the image compressor. Web images look crisp at just 100–300KB each, and you can compress many at once. The why and the order are in the guide on reducing file size.
Which format to use
- Photos: JPG is the safe default — smaller at the same quality.
- Logos, icons, transparency: use PNG.
- WebP, if your site supports it, gives the same quality at an even smaller size.
If it’s an iPhone HEIC photo
HEIC isn’t recognized by some browsers and uploaders. Convert first with the HEIC to JPG converter, then follow the steps above.
Frequently asked questions
- Won’t compression hurt quality? For on-screen web use, a sensible compression is barely noticeable — just don’t set the target too low.
- I have dozens of images. Drop them all in and process them in one batch.
- Is it safe? Everything runs in your browser; files are never sent to a server.