A link can look perfectly innocent and still take you somewhere hostile. Phishing attacks are built on that disguise — the FBI’s 2023 IC3 report logged more than 791,000 internet crime complaints — but quick browser checks, free link checkers, and a fallback plan can verify a URL before you click.
Internet crime complaints reported to the FBI in 2023: 791,000+ (FBI IC3 Report) ·
Percentage of data breaches that involve phishing: 36% (Verizon DBIR 2023) ·
New phishing sites created each month: 1.5 million (APWG)
Quick snapshot
- Link checkers scan URLs against databases of known threats (Bitdefender (security vendor))
- Hovering can reveal a spoofed link before you click (CISA (U.S. cybersecurity agency))
- Checkers can flag phishing, malware, and scams (Avast (security vendor))
- How quickly new phishing sites are added to checkers’ databases
- Whether free checkers catch all zero-day malware
- How much data can be stolen by a click alone before any download
- More than 1.5 million new phishing sites are registered each month (APWG (anti-phishing working group))
- NSA has shifted its guidance toward phishing-resistant MFA and remote browser isolation (NSA (U.S. intelligence agency))
- Automated scanners will keep catching known threats, but manual URL checks remain the last line of defense (CISA; Google Safe Browsing)
- If you clicked a bad link: disconnect, scan, change passwords, and turn on two-factor authentication (FTC; NSA)
Eight facts worth pinning up, one pattern: the protection stack works best when the checker is fast, you verify the domain, and you know the fallback if a click goes wrong.
| Fact | What it means for you |
|---|---|
| Primary function of a link checker | Scans and analyzes URLs for malicious content |
| Common detection categories | Phishing, malware, spam, and scams |
| Popular free link checkers | NordVPN Link Checker, Bitdefender Link Checker, Avast Link Checker, VirusTotal |
| Current phishing trend | Over 1.5 million new phishing sites per month (APWG (anti-phishing working group)) |
| Hover technique | Shows the destination URL in the browser status area (CISA (U.S. cybersecurity agency)) |
| Google’s advice | Use a bookmark or type the URL manually when a URL may be forged (Google Safe Browsing (Google’s threat-intelligence service)) |
| FTC’s fallback | Contact the sender through a known phone number or website (FTC (U.S. consumer protection agency)) |
| NSA’s systemic fix | Phishing-resistant MFA, protective DNS, and remote browser isolation (NSA (U.S. intelligence agency)) |
What is a link checker used for?
A link checker is the pre-click version of good judgment. Instead of loading a page in your browser, it compares the URL against databases of known threats and gives you a verdict before anything has a chance to run.
- Phishing, malware, and scam pages (Bitdefender (security vendor))
- Fraudulent or counterfeit websites (Avast (security vendor))
The implication: a link checker doesn’t replace caution; it gives you a second opinion before you trade a click for a possible infection.
How can I check if a link is legitimate?
Legitimate links are boring: they match the sender, the domain, and the destination. Suspicious links depend on the moment you stop looking closely. CISA (U.S. cybersecurity agency) warns that spoofed hyperlinks may not match the visible text when you hover over them, so the visible label is the least trustworthy part of a link.
How to check if a link is correct or not?
- Hover over the link and compare the visible text with the destination URL (CISA (U.S. cybersecurity agency))
- Watch for lookalike domains and misspelled words like “arnazon.com” instead of “amazon.com” (Avast (security vendor))
- Check for HTTPS and the padlock icon before typing anything sensitive (ESET (security vendor))
- If a message claims to be from a company, contact that company through its official site or a known phone number (FTC (U.S. consumer protection agency))
- When a URL may be forged, use a bookmark or type the address manually (Google Safe Browsing (Google’s threat-intelligence service))
One lookalike character can make a fake domain look real. The fix is not “trust my eyes,” it’s “verify through a route I control.”
For a hands-on comparison of free scanners, our Link Checker: Is That URL Safe? Free Tools Compared guide covers the differences between the major tools.
What this means: the fastest legitimacy check is comparison — compare the label, the domain, and the route you normally use to reach that site.
How can I check a link without clicking it?
You don’t need to open a suspicious page to learn where it goes. The URL itself contains most of the answer; a checker supplies the rest.
How to open a link without actually opening it?
If you must inspect a suspicious URL, let the checker click, not you.
- Hover over the link and read the destination shown by your browser. CISA (U.S. cybersecurity agency) says the hover destination is the detail to compare against the displayed text.
- Copy the URL and paste it into a dedicated link checker instead of clicking it (Security.org (consumer security research group)).
- Use a scanner that fetches the page remotely; ESET (security vendor) says its link checker can instantly check a URL for malware, phishing, fraud, or scams.
- If the link came from someone you know, confirm the request through a separate channel (FTC (U.S. consumer protection agency)).
No checker sees the future. A brand-new malicious URL can look clean until someone reports it, which is why manual inspection still matters.
Why this matters: the less you rely on a single click to judge a page, the fewer chances you give a malicious site to load in your browser.
Can I open a suspicious link safely?
The safest answer is: not in your everyday browser. U.S. Department of Defense (military cybersecurity guidance) says users should be trained to identify suspicious emails and links and to avoid interacting with them. That “avoid interacting” standard is the one to hold in your head.
If you need to analyze a suspicious URL, Google Safe Browsing (Google’s threat-intelligence service) advises checking the URL’s owner rather than trusting the page itself, and NSA (U.S. intelligence agency) recommends phishing-resistant MFA, protective DNS, and remote browser isolation as defenses against evolving phishing attacks.
A scanner can hold millions of known bad pages in its database, but it cannot see the next phishing site before it’s built. Distance is the real protection.
The pattern: safe inspection is about distance. Each layer — a scanner, an isolated session, a separate device — moves the risk further from your daily machine.
What if I accidentally clicked a suspicious link?
Panic helps the attacker. A response sequence helps you. Move through these steps in order, and don’t close the browser until you’ve cut the connection.
- Disconnect from the internet — turn off Wi-Fi, unplug Ethernet, or switch on airplane mode.
- Run a full antivirus scan on the device you were using.
- Change passwords for email, banking, and other key accounts using a separate clean device.
- Turn on two-factor authentication wherever it’s available. NSA (U.S. intelligence agency) specifically recommends phishing-resistant MFA for accounts that hold sensitive information.
Can someone steal your info if you click a link?
The exact amount of data a click alone exposes is unclear. What is clear: if the page loads a fake login, anything you type on that page belongs to the attacker.
Can a virus spread just by clicking a link?
- The U.S. Department of Defense (military cybersecurity guidance) treats suspicious links as something to avoid interacting with, because a single interaction can lead to a malicious download or exploit attempt.
- Browsers and security tools block many of these attempts, but no blocklist is perfect.
How does clicking a link get you hacked?
- Phishing links often lead to credential-harvesting pages that imitate a real login.
- Redirects can hide the final destination, so the URL you see is not necessarily the page you get.
- A single click can also kick off a download you didn’t request.
The takeaway: after a bad click, the most valuable asset is time. Cut the network fast, scan, rotate credentials, and only then figure out what the link was trying to do.
How do I tell if I got a virus from a website?
Malware doesn’t always announce itself with a scary pop-up. On a typical computer, the first signs are a slowdown that won’t go away, pop-ups appearing out of nowhere, or a browser that keeps redirecting you to pages you didn’t ask for.
Does malware eventually go away?
Malware that sits on a device usually stays until something removes it. Reboots and pop-up blockers may quiet the symptoms, but they don’t remove the infection.
- Run a full antivirus scan, including offline or boot-time scans if your security software offers them.
- Review running processes and startup programs for unfamiliar entries.
- Reset browser settings if your homepage or search engine changed without permission.
- If one scanner finds nothing but the symptoms persist, get a second opinion from a different reputable security tool.
Why it matters: malware is not a cold that clears up on its own. The device that’s acting strange is the device an attacker may be using to gather more data.
Confirmed facts
- Link checkers can identify known malicious URLs (Bitdefender (security vendor); Avast (security vendor))
- Hovering shows the true link destination (CISA (U.S. cybersecurity agency))
- Clicking a malicious link can lead to malware infection (U.S. Department of Defense (military cybersecurity guidance))
- Phishing-resistant MFA reduces account takeover risk (NSA (U.S. intelligence agency))
What’s unclear
- How quickly new phishing sites are added to checker databases
- Whether free checkers detect all zero-day malware
- The exact amount of information a click can expose before any download
- How much a single click, without typing, can accomplish before you intervene
“A free tool designed to verify URLs, helping users avoid malware, phishing attempts, and counterfeit websites.”
Bitdefender (security vendor)
“Instantly check a URL for malware, phishing, fraud, or scams.”
ESET (security vendor)
The link that seems too convenient, too urgent, or too close to a login page is the one your future self will thank you for checking. Link checkers and hover previews make phishing harder without asking for much in return. For anyone reading this on the device they use for banking, the choice is clear: verify before you click, or plan on scanning for malware later.
Frequently asked questions
Are all link checkers free?
Most mainstream link checkers from security vendors are free for individual use. Paid services exist, but a free tool is enough to check an unexpected link.
How accurate are link checkers?
Accuracy depends on how quickly the tool’s database learns about new threats. A checker that catches a known phishing domain may not recognize a domain created ten minutes ago.
Can a link checker protect against zero-day threats?
No link checker can promise protection against zero-day threats. It can only flag what it already knows or can infer from the URL and page behavior.
What is the difference between a link checker and a traditional antivirus?
A link checker inspects the URL before you visit; antivirus software protects the files and processes on your device. The two complement each other.
Should I use a link checker on shortened URLs?
Yes. Shortened URLs hide the destination, so paste the short link into a checker that expands and scans the final URL before you click.
Is it safe to use online link checkers?
Generally yes, if you use a reputable security vendor and avoid entering personal information into unknown scanner sites.
Related reading
Anyone who wants scanner-by-scanner differences can go through the comparison guide above; the AI chat guide covers a separate set of free online tools.
Daniel Harper is Editor-in-Chief at Aussie Report, overseeing editorial standards, publication decisions and corrections.