Website image recommendation summary
Suggested starting point: 160-250 KB for many standard website images, with lower targets for repeat-use graphics and thumbnails
How to choose the right image size for a website
- 1
Estimate the maximum rendered width the image will occupy on the website.
- 2
Resize the source image to a sensible display width if it is far larger than needed.
- 3
Choose a format that matches the asset type, then compress toward a practical website file size.
- 4
Preview the result in the page layout and reduce further if the asset still feels heavy for its role.
General website image guidance
- Start around 160-250 KB for many standard content images that sit inside articles, service pages, and marketing sections.
- Keep thumbnails, repeated card images, logos, and simple UI graphics closer to 40-120 KB when possible.
- Use WebP or JPEG for most photographic website imagery, and keep PNG for transparency or crisp interface graphics that really need it.
- Resize first when the source dimensions are much larger than the on-page display size, then compress to remove leftover weight.
This page covers broad website sizing decisions. If you already know the exact page type, the blog, product-page, and landing-page guides below give tighter recommendations.
Dimensions
- Full-width website images often work well around 1600-2000 px wide when the layout can scale them down responsively.
- Standard inline content images often look good around 1200-1600 px wide before compression.
- Small cards, thumbnails, and UI support graphics usually do not need the same dimensions as a banner or hero image.
- Use the rendered container as the reference point rather than exporting every asset at camera-original size.
Key rules
- Compress when the dimensions are already reasonable but the file is still heavier than the page needs.
- Resize when the image is dramatically larger than its display slot, even if the quality still looks good.
- Prefer one clear source of truth for each asset size so you do not keep recompressing exported copies.
- Review repeat-use images more strictly, because one heavy card asset can be multiplied across a whole page.
Common mistakes
- Uploading a 4000 px source image to a page that only renders it at 900 px wide.
- Using PNG for every website image even when a photo-oriented format would be much lighter.
- Treating one universal KB target as correct for every asset on the site.
- Only checking desktop sharpness and ignoring mobile performance tradeoffs.
Frequently asked questions
What is a good website image size in KB?
Many standard website images work well somewhere around 160 KB to 250 KB, but smaller support graphics can be far lighter and large hero visuals may need different tradeoffs. The best target depends on the image role, display size, and how many images load on the page.
When should I resize instead of only compressing?
Resize first when the source dimensions are much larger than the layout needs. Compression alone cannot fully solve a file that is oversized in both pixels and KB.
What format is best for general website images?
WebP or JPEG is usually best for photographic images, while PNG makes more sense for transparency, interface assets, or graphics that must stay very crisp.
How is this different from the blog, product-page, and landing-page guides?
This page is the broad website guide. The other pages narrow the advice around editorial article images, ecommerce product photos, or landing-page campaign visuals with different quality and dimension priorities.