You can paste a URL into Alfred's query box or grab a URL directly from the clipboard.
resolve URL— Find and display the canonical URL after all redirects.
↩— Open the new URL in your default browser
⌘+↩— Copy the new URL to the clipboard
resolvepb— Grab the URL from the clipboard and resolve any redirects as
If the URL has no redirects, a "No redirects" message will be displayed.
This workflow is released under the MIT licence. It uses Alfred-Workflow for the plumbing and to resolve HTTP redirects.