Safari is designed to reduce cross-site tracking, but the exact settings for blocking third-party cookies can still be confusing.
This guide explains how to block third-party cookies in Safari on Apple devices and what to expect after changing the setting.
What third-party cookies are and why Safari blocks them
Cookies are small pieces of data websites store in your browser to remember logins, shopping carts, preferences, and other session details.
First-party cookies come from the site you are visiting, while third-party cookies are created by other domains, often used for advertising, analytics, and cross-site tracking.
Safari has long emphasized privacy, and Apple combines cookie restrictions with features such as Intelligent Tracking Prevention, cross-site tracking prevention, and anti-fingerprinting protections.
Together, these tools make it harder for advertisers and data brokers to follow users from site to site.
How to block third-party cookies in Safari on Mac
On macOS, Safari includes a built-in privacy setting that helps prevent third-party cookies from being used for tracking.
The setting name may vary slightly by macOS version, but the process is straightforward.
- Open Safari.
- In the menu bar, select Safari and then Settings or Preferences.
- Click the Privacy tab.
- Enable Prevent cross-site tracking.
- Keep Block all cookies turned off unless you want to stop both first-party and third-party cookies.
The Prevent cross-site tracking option is the most important setting for most users.
It allows websites to function while limiting third-party tracking behavior.
By contrast, Block all cookies is much stricter and can break logins, payment flows, embedded media, and shopping carts.
Should you turn on Block all cookies?
In most cases, no.
Blocking all cookies can make Safari more private, but it often causes website compatibility problems.
If you only want to reduce tracking, start with cross-site tracking protection instead of a total cookie block.
How to block third-party cookies in Safari on iPhone and iPad
Safari on iPhone and iPad uses system-level privacy controls.
If you want to block third-party cookies in Safari on iOS or iPadOS, check the Safari settings in the Settings app.
- Open Settings.
- Scroll down and tap Safari.
- Under Privacy & Security, turn on Prevent Cross-Site Tracking.
- Leave Block All Cookies off unless you need a stricter setup.
This setting helps Safari limit trackers that try to follow you between different websites.
It is especially useful on mobile devices, where browser sessions, app links, and embedded content often make tracking easier.
What happens after you block third-party cookies?
After enabling third-party cookie protection, Safari may stop certain ad networks, embedded services, or analytics tools from recognizing you across sites.
That can improve privacy, but it can also change how some pages behave.
- Sign-in sessions: Most logins should still work, but some federated login systems may behave differently.
- Shopping sites: Cart contents usually remain available through first-party cookies.
- Embedded content: Some maps, videos, or social widgets may load differently.
- Ad personalization: Ads may become less tailored to your browsing history.
- Analytics: Some sites may report less detailed cross-site behavior.
In practice, Safari’s privacy controls are designed to reduce tracking while preserving everyday browsing.
If a site does fail, you can temporarily disable the setting, use a different browser for that task, or clear site data and try again.
How Safari’s privacy features work with cookies
Safari does more than simply accept or reject cookies.
Apple’s privacy architecture includes several layers that make third-party tracking harder.
- Intelligent Tracking Prevention (ITP): Limits the lifespan and reach of tracking cookies.
- Cross-site tracking prevention: Reduces the ability of domains to observe activity across multiple websites.
- Private Browsing: Prevents browsing history and local data from being retained in normal session storage.
- Hide IP address from trackers: Helps reduce the correlation of browsing activity.
- Fraudulent Website Warning: Adds a security layer against known malicious sites.
These protections work together, so you may still see meaningful privacy benefits even if you do not use the strictest cookie setting.
For most users, Safari’s default privacy posture is already stronger than many competing browsers.
How to check whether third-party cookies are being blocked
There is no single visible badge in Safari that says third-party cookies are blocked, but you can look for signs that the settings are working.
- Open Safari settings and verify Prevent cross-site tracking is enabled.
- Test a website that uses third-party embedded content or ad scripts.
- Use Safari’s Web Inspector on Mac to review network behavior if you need technical confirmation.
- Check whether cookie consent banners or login widgets behave differently after the change.
If you are troubleshooting a privacy-sensitive website, clear the site’s existing data before testing.
Old cookies may persist until removed, which can make it seem like the new setting is not working.
How to clear Safari cookies and site data
Blocking third-party cookies does not always remove cookies that were already stored.
If you want a fresh start, clear existing website data in Safari.
On Mac
- Open Safari and go to Settings or Preferences.
- Open the Privacy tab.
- Click Manage Website Data.
- Remove individual sites or choose to remove all stored data.
On iPhone and iPad
- Open Settings.
- Tap Safari.
- Scroll down and tap Clear History and Website Data.
This can fix loading problems caused by stale cookies, cached sessions, or broken site state.
If you only want to remove data for a specific website, Safari on Mac offers more granular controls than iPhone or iPad.
Common problems after changing Safari cookie settings
Some websites rely on third-party cookies for features that users take for granted.
If a page breaks after you tighten Safari privacy settings, the cause is often a dependency on cross-site authentication or embedded content.
- Persistent login issues: Try clearing the site data and logging in again.
- Blank embedded frames: A tracker-blocked widget may not load properly.
- Checkout failures: Payment pages may need exceptions or a temporary setting change.
- Repeated consent prompts: Cookie banners may reappear more often when third-party storage is restricted.
For professional use, it helps to separate convenience from privacy.
You can keep Safari’s protections enabled for general browsing and temporarily adjust settings only when a trusted site requires it.
Best practices for stronger privacy in Safari
Blocking third-party cookies is only one part of a broader privacy strategy.
If your goal is to limit tracking in Safari, combine cookie controls with other settings and habits.
- Use Private Browsing for sessions you do not want saved locally.
- Review website permissions for location, camera, microphone, and notifications.
- Enable Prevent cross-site tracking on all Apple devices.
- Keep Safari and your operating system updated to receive the latest privacy improvements.
- Install extensions only from trusted developers and review their permissions carefully.
For users who manage sensitive work, research, or finance activity, Safari’s privacy settings can significantly reduce passive tracking without requiring advanced configuration.
The key is to use the built-in protections consistently and avoid turning on broader cookie blocking unless you truly need it.
When to consider stricter browser settings
If you want even tighter control than Safari’s default protections, you can pair cookie restrictions with a content blocker or a privacy-focused DNS service.
Some users also separate browsing tasks by using different browsers for shopping, work, and private research.
That approach can reduce tracking exposure while preserving site compatibility.
The main tradeoff is convenience: the more restrictive your setup, the more often you may need to clear data or sign in again.