Both the Wayback Machine and archive.today handle redirects by recording the redirect under the redirecting URL and recording the actual snapshot under the final URL (neither perfectly, though—see below).[0][1] And a short URL that occurs many times in the web will be picked up by crawls in the same way as other URLs. Thus, the effect of short URLs on archiving isn't entirely disastrous. Still, the cost is paid in the long tail of short URLs that will never be archived.
Both archive services have shortcomings of their own related to URL shortening:
- archive.is ironically encourages the use of shortened URLs to its own archived snapshots![0] Its long URLs, which I've never seen used in the wild, are for some reason hidden away in the 'share' menu.
- archive.is stores the original submitted URL in the final snapshot and shows it in the header if is not the same as the ultimately archived URL,[0] but WBM does not.[1]
- WBM mysteriously doesn't work on bit.ly (returning only the message 'Job failed.'[2]), but does work on tinyurl.com. Unfortunately, opaque errors like this are not uncommon with the WBM, errors sometimes as serious as snapshots becoming completely blank years after being taken! Somewhat concerning considering its role as an archive, I'd say. If only the Internet Archive had open-sourced their server like Wikimedia did from the start…
[0] example: https://archive.today/KWDbr
[1] example: https://web.archive.org/web/0/tinyurl.com/3k8mma8k
[2] For example, try http://web.archive.org/save/https://bit.ly/3vO29UB
Aside: It's a bit interesting, considering both current events and archive.is's notoriously unclear ownership (the only common info being the domain's registration to an individual in Prague) that two of the five social media sites in the 'share' menu are VK and LiveJournal. Are those commonly used outside of Russia in recent years?