A URL shortener is a service that takes a long web address and gives you a short one, such as bit.ly/3xYz, that forwards visitors to the original. People use them to fit links into texts, printed material and social posts, and to count how many times a link was clicked.
How a short link redirects
The shortener stores a record pairing a short code with your full destination URL. When someone opens the short link, the shortener's server looks up the code, logs the click (time, rough location, device, referrer), and replies with an HTTP redirect. Most use a 301 or 302 status, and the browser immediately requests the real page. The whole hop usually takes a fraction of a second, but it is an extra network round trip.
Well-known services include Bitly, TinyURL, Rebrandly and Short.io. Google's own goo.gl shortener was shut down to new links in 2019, which is a good reminder that short links depend entirely on the service staying alive.
Short links on a gym's printed flyer
A gym prints flyers advertising a spring class. The real sign-up link is https://riversidegym.com/classes/spring-bootcamp?utm_source=flyer&utm_medium=print, far too long to type. They create go.riversidegym.com/spring on a shortener that supports custom domains. The flyer stays tidy, the UTM parameters still reach analytics, and if the class page moves they can change the destination without reprinting anything.
Custom domains: the safer way to shorten
Generic shortened links hide where they lead, and spammers abuse them, so some email filters and cautious readers distrust them. Using your own short domain or subdomain keeps your brand visible and means the links survive if you switch providers, as long as you keep the domain. If you only need shorter links occasionally, a clean URL on your own site, like /spring redirecting to the full page, may be all you need.
When you can skip it
On social platforms that already shorten or preview links, and on your own website, shorteners add little. They earn their place in print, SMS, podcasts and anywhere a person must type or remember the address, and they pair well with a QR code whose destination you may want to change later.
Short-link mistakes
- Printing generic short links on durable material, then losing the account or the service closing.
- Shortening internal links on your own site, which adds a redirect hop for nothing.
- Relying on free-plan click stats as exact numbers; bots and link previews inflate them.
- Forgetting to update a destination after the target page is deleted, leaving the link pointing at a 404.
Related terms
- URL: the long address being shortened.
- 301 redirect: the forwarding mechanism behind many short links.
- UTM parameters: tracking tags often hidden inside short links.
- QR code: another way to get a long URL into print.