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10 Tech How-To

How to Lock WhatsApp Chats on iPhone

Guide 10-35326 · Updated · Step by step

This guide shows you how to lock individual WhatsApp chats (and the entire app) on your iPhone using Face ID, Touch ID, or your passcode. You’ll need an iPhone running iOS 17 or later and the latest version of WhatsApp from the App Store. The built-in Chat Lock feature keeps your private conversations hidden behind biometric authentication, so even if someone else has your unlocked phone, they can’t open those chats without your face, fingerprint, or passcode.

What You’ll Need

  • An iPhone with Face ID or Touch ID enabled (or a passcode set up).
  • WhatsApp installed and updated to the latest version (Chat Lock is available on iOS 17+).
  • Your WhatsApp chats backed up (optional, but recommended before any changes).

Step-by-Step

  1. Open WhatsApp on your iPhone and go to the Chats tab (the bottom-left icon that looks like a chat bubble).
  2. Find the chat you want to lock – it can be an individual or group chat. Tap and hold on the chat until a menu appears.
  3. In the menu, tap Lock Chat. A confirmation screen will appear explaining that the chat will be hidden from the main chat list and protected by Face ID or Touch ID.
  4. Tap Lock Chat again to confirm. The chat will now disappear from your main chat list and be moved to a separate “Locked Chats” section.
  5. To view a locked chat, scroll to the top of your Chats list and tap Locked Chats. You’ll be prompted to authenticate with Face ID, Touch ID, or your passcode.
  6. To unlock a chat permanently, go to Locked Chats, authenticate, then swipe left on the chat and tap Unlock. Confirm by tapping Unlock again.

That’s it! The chat is now locked. If you want to lock the entire WhatsApp app, you can enable App Lock in Settings (see Tips below).

Common Mistakes

  • Not updating WhatsApp: Chat Lock only appears in recent versions. If you don’t see the option, go to the App Store and update WhatsApp.
  • Forgetting that locked chats are hidden: The chat disappears from your main list, so if you don’t remember it’s locked, you might think it was deleted. It’s still there, just hidden behind the Locked Chats section.
  • Using an old iOS version: Chat Lock requires iOS 17 or later. If your iPhone is older and can’t update, you won’t have this feature.
  • Trying to lock a chat from the chat window: You can’t lock a chat while it’s open. You must do it from the chat list by long-pressing.

Tips

  • Lock the entire app: If you want to protect all your WhatsApp messages, go to Settings (gear icon in the bottom-right), then Privacy > App Lock. Toggle on “Require Face ID” (or Touch ID). You can choose to require authentication immediately or after 1 minute.
  • Use Chat Lock for sensitive conversations: It’s perfect for banking OTPs, private photos, or anything you don’t want someone scrolling through your phone to see.
  • Locked chats don’t show message previews: Even when you receive a new message in a locked chat, it won’t show a preview on your lock screen or in the notification center – only “WhatsApp: New message” appears.
  • You can lock multiple chats: Repeat the steps for each chat you want to protect.

Troubleshooting

I don’t see the “Lock Chat” option. Make sure WhatsApp is updated. Go to the App Store, search for WhatsApp, and tap Update if available. Also, check that your iPhone is running iOS 17 or later by going to Settings > General > Software Update.

Face ID/Touch ID isn’t working for locked chats. Go to Settings > Face ID & Passcode (or Touch ID & Passcode) on your iPhone and make sure Face ID/Touch ID is enabled for WhatsApp. You can also try restarting your iPhone.

I forgot my passcode and can’t access locked chats. Unfortunately, there’s no way to bypass the lock. You’ll need to restore your iPhone from a backup (which will remove the lock), but you’ll lose any data since the backup. This is why it’s important to remember your passcode.

Locked chats are not appearing in the list. Scroll up to the very top of your Chats list. The “Locked Chats” section appears above your regular chats. If you don’t see it, pull down to refresh the list.

Chat Lock keeps turning off after an update. This can happen after a major iOS update. Simply re-lock the chats by following the steps above.

Frequently Asked Questions

Can I lock a chat without hiding it from the chat list? No, Chat Lock automatically hides the chat from the main list and moves it to the Locked Chats section. If you just want to hide a chat without a lock, you can archive it (swipe left and tap Archive).

Does Chat Lock work on WhatsApp Web or Desktop? No, Chat Lock only applies to the iPhone app. If you use WhatsApp Web or Desktop, locked chats will appear normally there.

Can I lock individual messages within a chat? No, you can only lock the entire chat. There’s no way to lock specific messages inside a chat.

Will I still receive notifications for locked chats? Yes, you’ll receive a notification, but it won’t show the message content or the sender’s name. It will just say “WhatsApp: New message.”

Can I lock a chat if I don’t have Face ID or Touch ID set up? No, you need at least a passcode set on your iPhone. If you don’t have one, go to Settings > Face ID & Passcode (or Touch ID & Passcode) and set up a passcode first.

How do I unlock a chat permanently? Go to Locked Chats, authenticate, swipe left on the chat, tap Unlock, and confirm. The chat will return to your main chat list.

Related

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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