JavaScript is usually on by default, but you can turn it back on if a website tells you it's disabled

Most Android browsers have JavaScript enabled from the start, so you rarely need to change it. But if a website says "JavaScript is disabled" or won't load properly, you can turn it back on in your browser settings. The steps differ depending on which browser you use — Chrome, Firefox, Samsung Internet, or another app.

JavaScript is a programming language that makes websites interactive. Without it, many sites won't show videos, buttons won't work, forms won't submit, and pages may look broken. Turning it on takes less than a minute and works the same way across most Android browsers.

Key Takeaways

  • JavaScript is turned on in most Android browsers by default, so you only need to change it if a website specifically says it's disabled.
  • Chrome, Firefox, and Samsung Internet all have JavaScript settings buried in their advanced or privacy menus, not in the main settings page.
  • Once you turn JavaScript on, it stays on for all websites unless you turn it off again.
  • If a website still doesn't work after enabling JavaScript, the problem is usually something else — try clearing your browser cache or using a different browser.

Enable JavaScript in Chrome for Android

Open Chrome and tap the three vertical dots in the top right corner. Scroll down and tap Settings. Then tap Site settings, which is usually near the bottom of the settings list.

Tap JavaScript. You will see a toggle switch next to "Allowed". Make sure the toggle is turned on (it will be blue and switched to the right). If it is already on, JavaScript is enabled. If it is off, tap the toggle to turn it on.

Go back to the website that was having trouble and refresh the page. The site should now work if JavaScript was the only problem.

Enable JavaScript in Firefox for Android

Open Firefox and tap the three horizontal lines in the bottom right corner (or top right, depending on your phone). Tap Settings. Then tap Privacy.

Scroll down to the "Permissions" section and look for JavaScript. The setting should show "Allowed" with a toggle switch next to it. If the toggle is off, tap it to turn JavaScript on. If it already says "Allowed", JavaScript is already enabled.

Return to the website and refresh. Firefox will now run JavaScript on all sites.

Enable JavaScript in Samsung Internet

Open Samsung Internet and tap the three horizontal lines in the bottom right corner. Tap Settings. Then tap Sites and downloads.

Tap JavaScript. You will see a toggle switch. Make sure it is turned on (blue and switched to the right). If it is off, tap the toggle to enable it.

Go back and refresh the website. It should now load properly.

Enable JavaScript in other Android browsers

If you use Opera, Edge, or another browser, the process is similar. Open your browser's menu (usually three dots or three lines), go to Settings, look for "Site settings" or "Privacy", and find JavaScript in that menu. Turn on the toggle next to it.

If you cannot find JavaScript in your browser's settings, check the browser's help documentation or support page. Some smaller browsers do not let you control JavaScript — it is either always on or always off.

What to do if the website still doesn't work

Enabling JavaScript fixes most "JavaScript is disabled" errors, but not all website problems. If a site still will not load after you turn JavaScript on, try clearing your browser's cache. In Chrome, go to Settings > Privacy > Clear browsing data, check "Cookies and site data", and tap Clear data. Then go back to the website and refresh.

If clearing the cache does not help, try opening the website in a different browser. Sometimes a website works in Chrome but not Firefox, or vice versa. This usually means the problem is with your browser, not with JavaScript. You can also try restarting your phone, which fixes many temporary browser issues.

Why you might want to turn JavaScript off

Some people turn JavaScript off to speed up their phone or to block ads and tracking. If you do this, many websites will break or load slowly. Turning JavaScript off is rarely worth it on Android because modern phones are fast enough to handle it, and it causes more problems than it solves.

If you are concerned about privacy or tracking, a better approach is to use your browser's privacy mode (called "Incognito" in Chrome) or to install an ad blocker extension. These protect you without breaking websites.

Frequently Asked Questions

Is JavaScript safe to have turned on?

Yes. JavaScript is a standard part of the web and is safe when turned on. Browsers have built-in protections to stop malicious code from accessing your files or personal information. Turning JavaScript on does not make your phone less secure.

Will turning JavaScript on slow down my phone?

No. Modern Android phones are fast enough that JavaScript has almost no noticeable effect on speed. If your phone is slow, the problem is usually something else — too many apps running, low storage, or an old phone. Turning JavaScript on will not make it slower.

Do I have to turn JavaScript on for every website?

No. Once you turn JavaScript on in your browser settings, it stays on for all websites. You only have to change the setting once. If you turn it off later, it will be off for all sites unless you turn it back on.

What if I accidentally turned JavaScript off and forgot which browser I used?

Go through each browser you use and follow the steps above to turn JavaScript on. It only takes a minute per browser. Once you turn it on in all your browsers, you should not have this problem again.

Can a website force JavaScript to be off on my phone?

No. A website cannot change your browser settings. If a website says "JavaScript is disabled", it means your browser has JavaScript turned off — the website is just telling you to turn it on. The website itself cannot do it for you.