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Rotina Diária

URL Shortener: How It Works, When to Use One, and How to Avoid Scams

Learn how URL shorteners work, when to use one, and how to check where a shortened link goes before clicking. Spot risks and stay safe online.

Rotina Diária Published

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How a URL shortener works

A URL shortener stores a long web address in a table and returns a short code, such as example.com/abc123. When someone opens the short link, the shortener’s server looks up the code and responds with a redirect (HTTP status code 301 or 302) to the original address. Your browser follows the redirect automatically in a fraction of a second, so you usually don’t notice the extra step.

During that process, the shortener typically counts clicks and, in many cases, records details such as country, device, and referring website. That’s how these services provide link creators with analytics.

When to use a URL shortener

  • Print and spoken materials: A short URL is easier to type from a poster or read aloud on the radio. For printed materials, a QR Code can be even more convenient—try the QR Code Generator.
  • Very long links with tracking parameters that break in text messages or look messy in a bio.
  • Tracking campaign clicks when you need analytics.

For sharing on WhatsApp, you don’t even need a URL shortener: the WhatsApp link generator creates the official wa.me address, which is already short and shows where it goes.

Popular URL shorteners and what to compare

Popular services like Bitly and TinyURL offer free plans with limited features, as well as paid plans with custom domains, QR Codes, and reports. Social media platforms and email tools also shorten links automatically. Before you choose one, compare:

  • Destination preview: Can visitors see where a link goes before opening it?
  • Reliability: If the service shuts down or your plan expires, the link may stop working. URL shorteners have been discontinued before, leaving printed links with nowhere to go.
  • Visitor data: What information about people who click is recorded, and for how long?
  • Custom domain: Businesses often prefer their own domain, which can feel more trustworthy than a generic shortener.

The risks: short links hide their destination

The same feature that makes a URL look neat also hides where it leads. Scammers use shortened links in texts about “missed deliveries,” fake deals, and bank messages to disguise fraudulent websites. Be cautious if:

  • the message creates a sense of urgency (“Your account will be blocked today”);
  • a bank, government agency, or store sends a generic short link instead of using its own domain;
  • the link comes from an unknown number or a contact who says they “got a new number”—see our guide to the family impersonation scam.

For step-by-step instructions on checking where a link goes without opening it, see how to check where a shortened link goes.

Frequently asked questions

Are shortened links dangerous?

Not by themselves—they simply redirect you to another address. The risk is not knowing where a link goes before you click. Check the final URL with a preview or link checker before opening short links from people you don’t know.

Do shortened links expire?

It depends on the service. Many links work as long as the account and service remain active. With free plans or discontinued services, a link may stop working. For long-lasting printed materials, use an address on your own website.

Can a URL shortener tell who clicked?

It records visits to count clicks and, in many cases, stores technical details such as country, browser, and referring website. Read the service’s privacy policy before using it for campaigns.