Website image target summary
Suggested starting point: 200 KB for many website images, with lower targets for thumbnails, logos, and UI graphics
How to compress an image for a website
- 1
Upload the image you plan to publish on a page, post, product listing, or landing page.
- 2
Start with a website-friendly target such as 200 KB, or choose a lower target for thumbnails, logos, and lighter UI graphics.
- 3
Process the image and review file size, visible sharpness, and dimensions together.
- 4
Download the result and test it inside the real page layout before publishing.
Website image size guidance
- Start around 200 KB for many blog images, article visuals, and standard product photos.
- Use 100 KB or lower for thumbnails, logos, icons, UI graphics, and smaller supporting images.
- Large hero images often need both compression and dimension reduction before they feel web-ready.
- Choose the smallest file that still looks clear in layout, because website performance depends on image dimensions, format, and placement as much as raw KB.
This page is for website-performance workflows. There is no single official website file-size rule, so use the target as a starting point, then check how the image actually looks and loads in the page layout.
Dimensions
- Hero images usually need both sensible dimensions and compression, because a very large image can still feel heavy even when the file size looks acceptable.
- Product photos often need enough detail for zoom or texture, so they may need a slightly higher target than thumbnails or inline support images.
- Thumbnails, cards, icons, and UI graphics usually work best at much smaller file sizes than full-width content images.
Key rules
- Pick the target based on image role, not one universal site-wide KB number.
- Check dimensions and file size together before publishing.
- Use smaller targets for repeated or decorative images that appear many times on one page.
- If the image still feels heavy, try resizing dimensions before chasing an extremely low KB target.
Common mistakes
- Using the same target for a hero banner and a tiny thumbnail.
- Judging success by file size alone without checking how the image looks in layout.
- Compressing a large image repeatedly instead of resizing it to a more realistic display size first.
- Assuming 200 KB is a universal SEO or Core Web Vitals rule.
Frequently asked questions
What is a good file size for website images?
There is no single perfect number for every page, but 200 KB is a practical starting point for many standard website images. Smaller thumbnails, logos, and UI graphics often work better closer to 100 KB or below, while larger hero images may need different tradeoffs.
Should I compress website images before uploading to a CMS?
Usually yes. Compressing before upload makes it easier to keep blog posts, product pages, and media libraries lighter from the start.
What image format is best for website compression?
It depends on the image. JPEG or WebP often works well for photos, while PNG is more useful for graphics, screenshots, or transparency. The best choice depends on how much detail, sharpness, and transparency the page needs.
Should hero images use the same file-size target as thumbnails?
No. Hero images usually need more visual detail and often need dimension changes as well as compression, while thumbnails and small support images can usually go much lower.
Will compressing for website use also change dimensions?
It can. To approach the target efficiently, the tool may reduce quality, dimensions, or both depending on the source image.