URL Shortener

A URL shortener takes a long web address and maps it to a short alias that redirects visitors to the original destination when they open it. This is useful anywhere character count or visual clutter matters: social media posts, printed materials, SMS messages, QR codes, or anywhere a long URL full of tracking parameters would look messy or get cut off.

Shortened links come with real trade-offs worth knowing before relying on them. Because the destination is hidden behind the short code, they're commonly abused to disguise phishing or malicious links, which is why some platforms flag or block certain shortening domains outright. They also introduce a dependency on the shortening service staying online indefinitely — if that service shuts down or purges old links, every short URL it issued stops working, a common cause of dead links in old posts and documents (sometimes called link rot).

For links that need to work reliably for years, or where SEO matters, a direct link to the original URL is generally the safer choice, since redirects add a small amount of overhead and can dilute link signals slightly. Shortened links are best treated as a convenience for sharing rather than a permanent addressing system.