Netcraft Extension
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Netcraft Extension

Blocks phishing and malicious JavaScript, provides detailed site info, and allows easy reporting of fraudulent sites.

★★★★☆ 4.4 167 reviews 70K+ users · Privacy & Security
Runs on all sites
Developer Netcraft Ltd
Install from Chromium extensions ↗

What it does

Permissions and access

Taken from the extension's own manifest file inside the package. The store listing does not spell this out, so it is worth reading before you install.

Can act on Every website you visit
PermissionWhat it allows
storageStore its own settings and data
tabsSee the addresses and titles of your open tabs
webRequestWatch your network requests

Requests 3 permissions — extensions doing the same job average 6.9.

Technical details

Version2.1.2
Download size767 KB
PlatformManifest V3
Needs Chrome102+
IncognitoWorks in incognito (separate session)
InterfaceToolbar popup, Options page
Interface languages Not translated

Description

The Netcraft Extension enhances your browsing experience by providing detailed information about the websites you visit while protecting you from phishing attacks and malicious JavaScript. Developed by Netcraft, an Internet services company with expertise in anti-fraud and web security, this tool leverages community reporting and proactive detection to keep you safe online. The extension integrates seamlessly into your browser, offering real-time protection and easy access to site data.

Key Features

  • Anti-Phishing Protection: The extension taps into Netcraft's anti-phishing community, which operates like a neighborhood watch. When users report phishing emails or fraudulent URLs, the information is processed and blocked for all extension users, providing an extra layer of defense. Netcraft also proactively searches for new fraudulent sites using diverse sources, ensuring rapid response to emerging threats.
  • Malicious JavaScript Blocking: Since 2017, Netcraft has been detecting shopping site skimmers that steal credit card details and web miners that hijack your computer's processing power. The extension blocks sites compromised with malicious JavaScript and prevents pages containing identified malicious scripts from loading. It automatically reports such pages to Netcraft, helping protect the broader community.
  • Detailed Site Reports: By clicking the Netcraft logo in your browser, you can access a wealth of information about any site you visit. This includes hosting details, risk ratings, and historical data, enabling you to make informed decisions about the safety of a website. This feature is particularly useful when visiting unfamiliar sites or before entering sensitive information.
  • Easy Reporting of Suspicious Sites: If you encounter a suspected phishing or fraudulent site, you can report it to Netcraft with a single click. This contributes to community protection, and Netcraft offers an incentive scheme for submissions, including rewards like iPads, backpacks, and mugs. More details are available at https://report.netcraft.com/pages/report-incentives.

The extension is free to use and updates automatically to ensure you have the latest protections. For more information, visit https://www.netcraft.com/apps-extensions/browser-extension/. Netcraft's privacy policy is available at https://www.netcraft.com/privacy/.

Extensions that do the same job

Matched by what these extensions actually do, not by store category, and sorted so the ones asking for the least access come first.

ExtensionSite accessPermissionsUsersRating
Netcraft Extension — this page All sites 3 70K 4.4★
Osprey: Browser Protection Limited 3 10K 4.9★
Anti-Grabify Limited 2 3K 4.7★
AegisWeb3 All sites 2 70K 4.8★
Malwarebytes Browser Guard All sites 13 11M 3.9★
Online Security All sites 18 10M 3.6★
Privacy Badger All sites 8 1M 4.5★

Want the same thing with less access? Osprey: Browser Protection, Anti-Grabify, MEGA ask for fewer permissions than this one.

Store data last checked August 14, 2026.