Put anonym.es on your site
One small script rewrites every outbound link on your pages to route through anonym.es. Your own domains stay as they are.
Anonymize every link on your site
Add one small script and every external link on your pages is routed through anonym.es automatically.
Where to place the script
Put it as close to the end of the page as you can, ideally right before the closing body tag. The script only touches links that are already on the page, so placing it last catches all of them.
Plain HTML
Paste the snippet just before </body> in your template.
<!-- ... your page ... --> <script src="https://anonym.es/js/anonymize.js?v=2"></script> <script>auto_anonymize();</script></body>
WordPress
Drop it into your theme's footer.php before </body>, or use a header-and-footer or code-snippets plugin so a theme update does not remove it.
<script src="https://anonym.es/js/anonymize.js?v=2"></script> <script>auto_anonymize();</script>
Forums (vBulletin, phpBB, and others)
Add it to the footer template of your style. Exclude your own domain so internal links keep working normally.
<script src="https://anonym.es/js/anonymize.js?v=2"></script> <script>protected_links = "yourdomain.com, partner.com"; auto_anonymize();</script>
A single link by hand
You can also build one link at a time. Put your target after the question mark.
https://anonym.es/?https://example.com/page
Or use the generator on the Anonymize a single link.