Netcraft Browser Extension
Netcraft Browser Extension: Free Chrome protection combines malicious-site warnings with credential-leak detection. Ranked #5 of 36 in Anti-Phishing Software by our editors (8.9/10); pricing: Free plan; best for free Chrome protection with credential-leak detection.
At a glance
- Editor score8.9 / 10
- PricingFree plan
- Best forFree Chrome protection with credential-leak detection
- Free planYes
- Paid fromNone
- Phishing URL blockingYes
- Facts checked13 Oct 2026
Where it wins
- Blocks or warns about known malicious websites, phishing sites, and fake shops
- Detects credential leaks sent to a different domain
- Lets users configure protection by attack type
Where it doesn't
- Coverage is limited to a Chrome extension
- Protection relies in part on Netcraft’s malicious-site data
- The risk rating for new sites is not a definitive classification
Our verdict on Netcraft Browser Extension
Netcraft Browser Extension is a free anti-phishing add-on for Chrome, intended for people who want browser-level warnings about malicious websites without a paid plan. It checks sites against Netcraft’s malicious-site data and can block or warn about known threats, including phishing pages and fake shops. Its standout credential feature detects when sensitive data is sent to a different domain, adding a warning beyond simply checking the site being visited.
The protection goes beyond URL blocking: Netcraft says the extension blocks malicious scripts such as JavaScript skimmers and cryptocurrency miners, and provides a risk rating for sites not yet in its database. Users can configure protection by attack type, report suspicious websites, and view website technology and hosting-provider information. These controls make the extension a more considered choice for users who want to inspect suspicious destinations and adjust what the browser flags, rather than rely on a single block-or-allow check.
The main trade-off is platform fit: the supplied platform listing is Chrome extension, so it is best suited to Chrome users rather than teams seeking protection across a broader endpoint or browser environment. The published description also notes that site checks use Netcraft’s malicious-site data, with a risk rating for sites not yet included; that rating is a signal, not a definitive verdict. Choose it for free Chrome protection that includes fake-shop and credential-leak checks. Users needing coverage beyond a browser extension should consider a broader security product.
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Netcraft Browser Extension pricing
Netcraft Browser Extension fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Phishing URL blocking | Yes |
| Email phishing detection | Not verified |
| Browser protection | Yes |
| Credential protection | Yes |
| Real-time scanning | Yes |
| Threat detection dashboard | Not verified |
| Deployment | Browser extension |
| Platforms | Chrome extension |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | netcraft.com |
| Facts checked | 13 Oct 2026 |
Alternatives to Netcraft Browser Extension
- Google Safe BrowsingFree web-threat warnings across Google products, browsers and developer APIs.9.4
- Avast Anti-PhishingA focused browser extension that scans URLs, blocks threats, and flags risky search results.9.2
- Bitdefender TrafficLight (now Bitdefender Web Sage)A free Chrome and Edge extension for real-time web protection, not email security.9.1
See all Netcraft Browser Extension alternatives →
Netcraft Browser Extension vs the competition
- Netcraft Browser Extension vs Google Safe Browsing
- Netcraft Browser Extension vs Avast Anti-Phishing
- Netcraft Browser Extension vs Bitdefender TrafficLight (now Bitdefender Web Sage)
- Netcraft Browser Extension vs Norton Safe Web
- Netcraft Browser Extension vs Microsoft Defender SmartScreen
- Netcraft Browser Extension vs Malwarebytes Browser Guard
Compare Netcraft Browser Extension with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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