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Free Security Tools

Good cybersecurity doesn't have to cost anything. These categories of free tools cover the most common home security needs. We recommend types of tools rather than specific products — the best choice depends on your devices and preferences.

Password managers

A password manager is the single most impactful tool you can adopt. It generates strong, unique passwords for every site and remembers them for you — you only need to remember one master password.

  • Look for a password manager that works across all your devices (phone, tablet, computer).
  • Choose one with browser extensions so it can auto-fill passwords without you typing them.
  • Ensure it supports two-factor authentication for the manager itself.
  • Several excellent password managers have free tiers that are sufficient for personal use.
  • Once set up, use it to audit your existing passwords — replace any that are weak or reused.

Breach checking services

Breach checking tools tell you if your email address or passwords have appeared in known data breaches. This gives you early warning to change compromised credentials before attackers use them.

  • Search for your email address on a reputable breach-checking service — these databases contain billions of leaked records.
  • Some services let you sign up for alerts when your email appears in new breaches.
  • If a breach is reported, change the affected password immediately and any other accounts using the same password.
  • Check your password manager for weak or reused passwords at the same time.

Browser security

Your web browser is your window to the internet. Keeping it updated and using its built-in security features reduces your exposure to malicious websites and tracking.

  • Keep your browser updated — modern browsers (Chrome, Firefox, Edge, Safari) update automatically by default.
  • Enable "Safe Browsing" or equivalent in your browser settings to warn you about dangerous sites.
  • Consider a reputable browser extension that blocks adverts and trackers — these also block many malicious scripts.
  • Be cautious about installing browser extensions — only use ones from the official extension stores with high ratings.
  • Check your installed extensions periodically and remove any you no longer use or don't recognise.

Antivirus and malware protection

Modern operating systems include built-in malware protection that's sufficient for most people when kept updated. Paid antivirus can add extra features, but it's not always necessary.

  • Windows Defender (built into Windows 10 and 11) is free, effective, and updates automatically — ensure it's enabled.
  • On macOS, Gatekeeper and XProtect provide baseline protection — keep macOS updated to maintain it.
  • If you choose a third-party antivirus, download it directly from the vendor's website — not from third-party software sites.
  • Be wary of pop-up warnings claiming your computer is infected — these are often scams designed to install malware.
  • Avoid running multiple antivirus programs simultaneously — they can conflict and slow down your device.

NCSC free resources

The National Cyber Security Centre (NCSC) is the UK government's cybersecurity authority. It publishes free, plain-English guidance and tools specifically for UK individuals and families.

  • The NCSC Cyber Aware campaign at cyberaware.gov.uk has practical advice for protecting yourself online.
  • Use the NCSC's Check Your Cyber Security tool to assess your current security posture.
  • The NCSC publishes guidance on a wide range of topics including passwords, two-factor authentication, and backing up data.
  • Report suspicious emails to report@phishing.gov.uk — the NCSC takes action against scam websites you report.

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