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Do not open a suspicious link just to find out where it goes. Preview the destination without following it, inspect the real hostname, compare it with the organization you expected, and verify any request through a contact method you already trust. If your browser displays a full-page Safe Browsing warning, stop and do not enter information.
What makes a URL suspicious?
A link can look familiar while pointing somewhere completely different. The words shown in an email, text message, social post, or chat are only a label; they do not prove the destination. A message may display a company name or a familiar logo, but the underlying address can lead to an unrelated hostname.
Context matters as much as the URL. An unexpected message that creates urgency, threatens account closure, requests a password or payment, or asks you to open an attachment deserves independent verification. The Federal Trade Commission (FTC) describes phishing as an attempt to trick people into clicking links or opening attachments so the sender can obtain information or money.
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Check the destination without following the link
On a computer: hover over the link
- Move the pointer over the link without clicking it.
- Read the URL preview that appears, usually in the lower-left corner of the browser or email window.
- Move the pointer away if the preview is truncated or unclear; do not click merely to reveal more information.
The Cybersecurity and Infrastructure Security Agency (CISA) recommends hovering over hyperlinks because a mismatch between the link text and the address shown on hover may indicate spoofing. Its guidance says: “Be wary of hyperlinks: Avoid clicking on hyperlinks in emails; hover your cursor over links in the body of the email—if the links do not match the text that appears when hovering over them, the link may be spoofed.”
On a phone or tablet: use preview or copy-link controls
Mobile interfaces differ by operating system and app. A long press may show a link preview, or an app may offer a Copy link action. Use whichever option reveals the address without navigating to it. If the app immediately opens the destination, cancel the action rather than using the page as an inspection tool.
After copying a link, you can paste it into a plain-text note or address field to read it. Treat the copied address as untrusted text: do not press Enter, tap Go, or select an autocomplete suggestion until you have finished checking it.
Read the real hostname, not the familiar words
Find the organization-controlled part of the address
Read the address from right to left and identify the registered domain immediately before the ending such as .com, .org, or a country-code ending. The hostname is the part that determines which site receives the connection. Extra words placed before that domain can be misleading.
For example, an address such as account.example.com has example.com as its central domain, while example.com.account-check.test is controlled by account-check.test, not by example.com. A brand name appearing somewhere in the middle of a long hostname is not proof that the brand operates the site.
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Look for mismatches and subtle changes
- The displayed link says one organization, but the preview shows a different hostname.
- A familiar name is misspelled or altered by an extra character, hyphen, or unusual ending.
- The address uses a different top-level domain than the organization normally uses.
- The hostname contains a brand-like word only as a subdomain or as part of a longer unrelated domain.
- The message claims to come from an organization, but the destination does not match the organization’s known web address.
A mismatch is a warning sign, not an automatic technical verdict. Some legitimate organizations use separate domains for services, payment processors, or support platforms. That is why you should verify the request through a channel you already trust instead of relying on the link alone.
Use the message context as evidence
Unexpected urgency
Be cautious when a message says you must act immediately, avoid a penalty, confirm an account, or claim a reward before a deadline. Urgency is designed to shorten the time you spend checking the destination and the sender.
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Requests for information or money
Treat a link that asks for a password, one-time code, payment details, identity documents, or other personal information as high risk when the request was not expected. The request may be legitimate, but the message itself is not sufficient proof.
Unexpected attachments or combined requests
A message that combines a link with an attachment, a payment request, or a demand to bypass normal procedures deserves extra scrutiny. Do not open the attachment while investigating the URL. Verify the entire request independently.
Sender identity is not enough
A familiar display name, logo, or email signature can be copied. The visible sender and the visible link should be treated as clues, not authentication. Inspect the destination and confirm the request through a known route.
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Verify the request independently
- Stop using the suspicious message as your source of truth. Do not call the phone number, use the reply address, or follow another link supplied in the same message.
- Start from a known location. Use a bookmark you created previously or type the organization’s web address that you already know is genuine.
- Find the organization’s official contact method. Use a phone number or web address obtained independently of the suspicious message.
- Ask whether the request is real. Describe the message and the action it asks you to take, but do not forward sensitive information or disclose a password.
- Proceed only after the request and destination are consistent. If the organization cannot confirm it, delete or report the message according to your normal workplace or service procedure.
Independent verification is especially important when the message concerns an account, an invoice, a delivery, a payroll change, a security alert, or a financial transfer. A genuine organization can confirm a request through its established support channel; you do not need to prove the message is legitimate by clicking it.
What to do when the browser warns you
Google Chrome’s Safe Browsing feature can display a full-page red warning when a site has been flagged as unsafe. Treat that screen as a stop signal. Do not enter personal information, download files, sign in, or click through simply to see what is behind the warning.
- Use the browser’s back control or close the tab.
- Do not override the warning unless you have a documented, trusted reason and understand the risk.
- Return to the independent verification process instead of retrying the suspicious address.
A warning is not the only reason to reject a link. A site can be suspicious even when no warning appears, because browser protection cannot establish that every newly created or compromised site is safe. The absence of a warning is not an endorsement.
Choose a Safe Browsing protection level deliberately
Chrome’s current guidance describes two relevant protection levels. They differ both in the kinds of danger they try to identify and in the information used for checks. The exact interface may change, so consult Chrome’s current settings documentation when you change the option.
| Setting | Protection scope | Information Google says may be sent for checks | Practical trade-off |
|---|---|---|---|
| Standard protection | Checks for known dangers. | Obfuscated portions of URLs are checked through privacy servers. When suspicious behavior is detected, fuller URLs and page content may be sent. | Provides baseline protection with more limited routine sharing, while still allowing additional data to be sent when a danger appears suspicious. |
| Enhanced protection | Checks for known dangers and potential new dangers. | URLs and small samples of page content may be sent for checks involving potential dangers. | Offers broader checking, with more URL and page data involved in those checks. |
These descriptions reflect Google’s stated Chrome behavior, not a universal description of every browser. If privacy or organizational policy is important, read the current explanation in your browser’s Safe Browsing settings and choose the level that fits your circumstances. Whichever level you select, continue to inspect links and verify unexpected requests; Safe Browsing is a layer of protection, not a replacement for those checks.
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A repeatable decision procedure
Low-risk-looking link, expected message
If you were expecting the message and the preview shows the organization’s known hostname, still confirm that the request makes sense. Use a bookmark or manually entered address for sensitive actions rather than signing in through an email link.
Unexpected message with a hostname mismatch
Do not open it. Capture the visible details if your reporting process requires them, then verify through a known contact method. A mismatch between the label and destination is enough to stop the click.
Unclear or shortened destination
If the preview does not let you identify the final hostname, treat the link as unverified. Use an independently obtained address instead. Do not rely on a short label, a familiar logo, or the sender’s insistence that the destination is safe.
Browser warning appears
Stop immediately, leave the page, and do not submit information. Continue only through a known-good route after the organization confirms that the request is genuine.
Common mistakes that defeat URL checking
- Clicking to inspect: Opening the page is not a neutral preview. It can expose you to a fraudulent login screen or a download prompt before you have verified the destination.
- Trusting visible link text: The label can be different from the underlying address.
- Checking only the first word: A brand-like word in a subdomain or path does not establish who controls the domain.
- Using the message’s phone number: A scammer can provide a convincing but false support number. Find contact details independently.
- Assuming HTTPS proves legitimacy: Encryption protects the connection to a site; it does not prove that the site operator is the organization you expected.
- Ignoring a warning because the message looks professional: Logos, formatting, and polished wording can be copied. A browser warning should still be obeyed.
- Testing the link in another browser: Switching browsers does not verify the sender or the organization. It only changes which protection systems may inspect the address.
Examples of safe reasoning
An account “security alert”
The message says your account will be locked and includes a button labeled “Review activity.” Hovering reveals a domain unrelated to the service you use. Do not click. Open your usual bookmark or type the service’s known address yourself, then check for alerts after signing in through that route. If necessary, contact support using details from the known site.
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An invoice from an unfamiliar sender
The email requests immediate payment and includes a link. The preview shows a different hostname from the supplier’s normal website. Do not open the invoice link or use the phone number in the email. Ask your normal purchasing contact or supplier representative whether an invoice was sent and where it can be retrieved safely.
A delivery notification
The message asks for personal information and uses an unfamiliar domain. Even if the visual design resembles a delivery company, treat the request as unverified. Visit the carrier’s known website or app independently and check the shipment there.
What to record when you report a suspicious link
If your workplace, school, bank, or email provider has a reporting process, preserve useful context without opening the link. Record the sender address, message date and time, subject, visible link text, and the destination shown in the preview or copied address. Do not include passwords, authentication codes, or other sensitive information in a report. Follow the organization’s established instructions for forwarding or attaching the message.
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Limits of URL inspection
Checking the hostname can reveal an obvious mismatch, but it cannot prove that a destination is trustworthy in every case. A legitimate domain can be compromised, and a fraudulent site can use a domain that looks plausible. That is why the safe process uses several independent signals: the actual destination, the message context, independent confirmation, and browser protection.
Likewise, a browser’s Safe Browsing result is not a substitute for judgment. A clean result means the browser did not flag the page under that protection system at that time; it does not confirm that the request in your message is genuine. Keep the browser’s protection enabled, heed warnings, and avoid entering information when the request is unexpected or cannot be independently confirmed.
Quick Recap
Quick checklist
- Do not click merely to inspect a link.
- Hover on a computer or use a mobile preview/copy-link action.
- Read the actual hostname and identify the domain that controls it.
- Compare the destination with the organization you expected.
- Treat urgency and requests for personal information as warning signs.
- Verify through a bookmark, a manually entered address, or contact details you already trust.
- Never enter information on a page Chrome flags with a full-page red warning.
- Review Safe Browsing’s protection and privacy settings in your browser.
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