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How to Fix: Sandbox not Allowed on Safari browser

The Safari browser has a built-in security feature, Sandbox, that helps you protect from security threats. You can fix the ‘Sandbox not allowed’ error by updating the iOS or iPadOS to the latest version, clearing the website data, or removing the content and ad blocker extensions.

FIX: Sandbox not Allowed on Safari browser

For every iOS user, the Safari browser offers a home-like feel as it is a native application of the Apple ecosystem. It comes equipped with the Sandbox feature that offers enhanced security to the users.

The Sandbox feature provides an extra layer of security by preventing malware and other malicious software from infiltrating your system. However, there are many instances when Safari restricts the Sandbox feature from accessing certain browser features.

Many iPhone users have reported coming across the ‘Sandbox not allowed’ error on the Safari browser, especially when they are playing any video that is embedded in the <iframe> tag.

Blocked Sandbox not allowed error on Safari iPhoneImage Credits: Apple Community User

The issue Sandbox is not allowed on Safari browser looks critical; the cause behind it might be pretty basic. For instance, such errors can result from an outdated browser or recent conflicting updates, third-party extensions, or other browser issues.

Update Safari

One of the common reasons why Safari might prevent Sandbox from accessing its features is using an outdated version of the browser. OR the last update version might have broken the existing feature.

So, if you are on an older version of Safari, it might have compatibility issues with the Sandbox feature. Therefore, it is recommended to use the latest version of Safari browser.

Updating Safari will also help resolve the issue if Apple Developers have released a patch or fix for the problem in the latest iteration.

Follow the steps to update Safari on iPhone:

  1. Open the Settings app on your iPhone.
  2. Select the General settings and open the Software Update screen.
    The browser will check for recent updates.
  3. Tap on the Download and Install command button.
    Download and Install the Software Update in iOS device
  4. The iOS will be updated with the latest Safari upgrades.

Disable Extensions

There’s no doubt that third-party extensions are a great way to enhance your browsing experience with Safari. But many times, these extensions create conflicts with your built-in browser features. And it might also result from the Safari browser’s sandbox conflicts.

All you need to do is disable the extensions and check if that resolves the issue; you can refer to the following steps:

  1. Open the Settings app on your iPhone.
  2. Scroll down and select the Safari menu from the Settings list.
  3. Under the General section, select the Extensions menu.
    Extensions menu in Safari on iPhone Settings screen
  4. Disable the toggle button for all installed extensions.
    Safari iPhone Extensions page

Check if this has resolved the Sandboxing error on your Safari browser app.

Clear Cache and Cookies

Clearing outdated browser files may help you fix the issue for good. In order to clear cache and cookies on Safari, all you need to do is follow these few steps:

  1. Open the Settings app on your iPhone.
  2. Scroll down and select the Safari menu from the Settings list.
  3. Scroll to the bottom and select the Advanced option.
  4. Select the Website Data tab to view cache storage size.
  5. Finally, hit on the Remove All Website Data command.
    Remove all website data from the Safari app in iPhone

It will remove all caches and cookies from your browser. Start a fresh browsing session and see if the problem still persists or not.

You can also use the Clear browsing data option to delete cache and cookies along with browsing history.

Bottom Line

Sandbox not allowed error on Safari browser has become quite a frequent issue in the last update. Hence, I strongly believe Apple will soon push a patch fix in their next iOS and iPad updates.

If you’re able to fix it with any other troubleshooting, then please do let us know. Our readers will find your contribution helpful.

Lastly, if you've any thoughts or feedback on How to Fix: Sandbox not Allowed on Safari browser, then feel free to drop in below comment box. You can also report the outdated information.

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Rahul Verma

Rahul is a Computer Science Engineer with an MBA degree. He is keenly interested in the field of tech and cryptocurrency. He has 6+ years of technical content writing experience, mainly experimenting with and troubleshooting computer and mobile operating systems. Connect him on LinkedIn.

1 thought on “How to Fix: Sandbox not Allowed on Safari browser”

  1. Hi – since the latest update to 16.4.1 to my iPad, I’m getting the sandbox error on a lot of streaming sites that I regularly use, and it’s a nuisance. I’m still not actually sure how you disable sandbox attributes as I don’t have any Safari extensions? When I click on Extensions it just sends me to the App Store .. any help would be appreciated. Thank you.

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