10 Best Free Online Privacy Check Tools

Privacy checks can feel daunting when every browser setting and account has its own controls. These tools help beginners, families, and small-business owners spot common exposures without needing to understand every technical detail first.

A scan is a snapshot, not a certificate that you are safe. Results can depend on your browser, network, and the information you choose to submit, so use only tools you trust and treat unexpected findings as a reason to investigate.

Quick picks

• Best for browser tracking: Cover Your Tracks — see which browser signals distinguish your setup.
• Best for breach checks: Have I Been Pwned — search an email address against known breaches.
• Best for site owners: Mozilla Observatory — review important website security headers.
• Best for basic connection checks: Cloudflare Radar — inspect public network and DNS details.

How we picked

We chose established, free-to-use services that answer specific privacy questions and explain their scope. A useful check should be understandable and should not demand unnecessary personal information. Compare:

• Purpose: does it check a browser, account, network, or website?
• Data requested: can you test without sharing more than needed?
• Clarity: does the result explain its limits?
• Actionability: can you make a sensible change afterward?
• Trust: is the service run by a known organisation with public documentation?

Browser and account checks

1. Cover Your Tracks

The Electronic Frontier Foundation's Cover Your Tracks examines tracker blocking and browser fingerprinting: the identifying combination of browser features websites may observe. It gives a readable starting point for deciding whether privacy protections are working. Fingerprint uniqueness can vary as sites and browsers change, and a test result does not show every tracker you encounter. Free to use.

Best for: curious browser users who want a plain-language look at tracking exposure.

2. Have I Been Pwned

Have I Been Pwned lets you check whether an email address appears in known data breaches. It is particularly useful for prioritising password changes on accounts whose credentials may have been exposed. A clean search cannot prove an address was never compromised, since not every breach becomes public or enters the database. Free search service; optional paid features may be offered.

Best for: anyone checking an old email address before improving account security.

3. Google Security Checkup

Google Security Checkup reviews security settings on a Google account, including recent activity and connected apps. Its guided steps can help casual users remove access they no longer recognise and review recovery options. It only covers the Google account, so it is not a complete privacy audit of other services or devices. Free for Google account holders.

Best for: people who use Gmail, Drive, or Android and want to tidy account access.

4. Apple Safety Check

Apple Safety Check helps iPhone users review sharing and access associated with their Apple account, including who can see certain information. It is especially relevant when someone wants to quickly reconsider sharing arrangements on a personal device. It does not scan every app or replace careful review of individual permissions, and availability depends on compatible Apple software. Included with supported Apple devices.

Best for: iPhone owners reviewing location and account sharing with other people.

Connection and website checks

5. Cloudflare Radar

Cloudflare Radar provides public views and diagnostic tools related to internet traffic, DNS, and network connectivity. Its connection checks can help a user understand what resolver or network details are visible during a session. The information is technical in places and is not a general audit of your personal online footprint. Free to use.

Best for: users who want a quick look at DNS and connection behaviour.

6. Mozilla Observatory

Mozilla Observatory checks a website's HTTP security headers and related configuration, then reports areas a site owner can improve. It is helpful for freelancers maintaining a small business website who want a first-pass checklist. A high score cannot guarantee that an entire site is secure, and some recommendations need developer knowledge to apply safely. Free to scan public websites.

Best for: small-site owners checking whether their security headers need attention.

7. Qualys SSL Labs Server Test

SSL Labs analyses the public TLS configuration of a web server, including certificate and protocol details. The report can help a site administrator find an expired certificate or outdated connection configuration. It is aimed at website operators rather than everyday personal privacy, and results should be interpreted with current technical guidance. Free public test.

Best for: website owners verifying the encrypted connection their visitors receive.

8. DNS leak test by IPLeak.net

IPLeak.net displays information such as the public IP address and DNS servers visible to a browser. People using a VPN can use it as a basic diagnostic for whether DNS requests appear to use an unexpected resolver. It cannot prove that a VPN provider is trustworthy or that all traffic is protected, and the page necessarily sees information from the test session. Free to use.

Best for: VPN users who want a quick, limited check of visible network details.

Data and permissions checks

9. Exodus Privacy

Exodus Privacy publishes reports about trackers and permissions found in Android apps. Its catalogue helps users ask more informed questions before installing an app or keeping one they rarely use. Reports depend on the analysed app version and do not establish how a company uses every collected datum in practice. Free and supported by a nonprofit organisation.

Best for: Android users comparing app permissions and embedded tracking components.

10. Permission Slip

Permission Slip is Consumer Reports' project for helping people understand and manage data-sharing requests with companies. It makes the often tedious process of contacting businesses more approachable for consumers. Coverage and available actions vary, and making a request cannot guarantee a company will erase every copy or stop all future collection. Free to use where supported.

Best for: consumers who want guided help making data requests to participating companies.

How to choose the right one

Begin with the question that prompted your concern. If you suspect an old password was exposed, check the email in Have I Been Pwned and change reused passwords; a browser fingerprint test will not answer that question. If you run a website, use Observatory or SSL Labs on your own domain and ask a developer to explain findings before changing configuration.

Be careful about submitting sensitive information. An email lookup is different from uploading a document or granting an app access to your contacts. Use a test page only when you understand what it collects, and avoid installing an unknown “privacy scanner” that requests broad device permissions.

When a tool flags a problem, make one change at a time and repeat the relevant check. Stockio's subnet calculator can help developers understand network ranges, but it does not assess personal privacy or reveal who is tracking you. For related technical reading, see Stockio's development resources and AI resources.

Key takeaways

• Pick a checker for a specific question; there is no single complete privacy scan.
• Review account access and exposed passwords before chasing less familiar browser settings.
• Website tests are most useful when you control the domain being scanned.
• A tool's results are limited by its data, test date, and the settings it can observe.
• Use reputable services, share as little as possible, and follow up with practical changes.