Facebook has dozens of apps spread across even more platforms. And although these apps have different looks and features, they've got one thing in common: To use them, you need to log into your Facebook account.

Luckily, logging into Facebook usually just requires your email and password.

Here's how to log into Facebook using your Mac, PC, iPhone, or Android device.

How to log into Facebook on an iPhone or Android device

On a mobile device, you can use either the Facebook app or website. The app is definitely easier, but both methods are similar.

If you want to use the app, you'll need to download it onto your device. You can get it for free from the iPhone App Store or Google Play Store.

---

1. Open the Facebook app or head to the Facebook website in your phone's web browser.

2. Enter the phone number or email associated with your Facebook account, and then the password.

Important: If you don't remember your Facebook password, tap Forgot Password? and enter your phone number or email. You'll be sent a link you can use to reset your password.

3. Tap Log In.

Depending on your security settings, you might need to enter a code that's sent to your phone or email.

Once you've signed in, Facebook should ask you if you want to save your login information. This will let you log back into Facebook later by just tapping your profile picture.

How to log into Facebook on your Mac or PC computer

On your computer, you should use the Facebook website.

1. Head to the Facebook website using your web browser.

2. Type your phone number or email address, and then your password.

Important: If you've forgotten your Facebook password, tap Forgot Password? and enter your phone number or email again. You'll be sent a link that'll let you make a new password.

3. Click Log In.

If you have two-factor authentication set up, you might be asked to enter a security code.

What a 'This person is unavailable on Messenger' error means on Facebook Messenger, and how to resolve itHow to deactivate your Facebook account on an iPhoneHow to use Messenger's Vanish Mode, a feature that lets you send disappearing messagesHow to change your birthday on Facebook using the website or app