The arc90 lab is the playground of arc90 - a New York-based technology and strategic consulting firm. The lab is a place for us to share our ideas, tools and the occasional experiment in web technology. All ideas, experiments and tools are licensed under Creative Commons.
licensed under creative commons

This site is licensed under a Creative Commons Attribution 2.5 License.


Link Thumbnail

A picture's worth a thousand words, right? So spice up those plain old text links with Link Thumbnail, the second tool from the arc90 lab.

  • What is this?
  • How do I use it?
  • Examples
  • Supported Browsers
  • Licensing
  • Discuss Link Thumbnail

What is this?

A little bit JavaScript, a little bit CSS and a little bit clairvoyance, Link Thumbnail shows users that are about to leave your site exactly where they're going. When that curious mouse pointer hovers over a link pointing to somewhere outside of your site, the script displays a small image of the destination page. It's a nice visual cue that serves a very real purpose: providing a clearer picture (no pun intended) of what's ahead.

How Do I Use It?

Download the Code

Click on the icon below to download the source code for Link Thumbnail:


The file,, contains the script, one required image and an example page. Once downloaded, upload the script and the image to your site. They must be in the same directory.

Link to the Javascript and Add Style

Add a link to the javascript in the page(s) you'd like Link Thumbnail implemented. Remember to adjust the path to properly point to the location of the file on your server. Then, you need to a line of CSS code. You can copy this entire block and paste it into your <head> section:

Give Thumbnails to All

Want all of your links to display thumbnails? No problem. Add the following line to your script headers:


You can see Link Thumbnail in action by clicking here.

Supported Browsers

Currently, the Link Thumbnail script has been tested and confirmed on the following browsers:

  • Internet Explorer 6.0+
  • Mozilla Firefox 1.5+
  • Apple Safari 2.0
  • Opera Version 8.51+


This arc90 tool is licensed under the Creative Commons Attribution 2.5 license.

Discuss Link Thumbnail

You can send feedback on Link Thumbnail at the arc90 blog.

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