Blocking stops someone from contacting you, but they won't know it happened

When you block a person on WhatsApp, they can no longer send you messages, call you, or see when you're online. They won't receive a notification that you've blocked them, but they will notice they can't reach you — their messages won't show a delivery checkmark, and calls won't go through. The block is when ready and takes effect across all your devices if you use WhatsApp on more than one phone or computer.

Blocking is different from muting or deleting a chat. A muted conversation still lets messages arrive; you just won't hear notifications. Deleting a chat removes it from your screen but the person can still contact you. Blocking cuts off contact entirely. You can unblock someone later if you change your mind, and doing so doesn't restore old messages — those stay deleted if you removed them.

Key Takeaways

  • Open the chat with the person you want to block, tap their name at the top, scroll down, and select Block Contact.
  • The blocked person won't be told you blocked them, but they'll see their messages don't deliver and calls don't connect.
  • You can unblock someone anytime by going to Settings, Account, Privacy, Blocked Contacts, and tapping Unblock next to their name.
  • Blocking someone removes their ability to see your profile photo, status updates, and last-seen time going forward.

How to block someone on your phone

Open WhatsApp and find the chat with the person you want to block. Tap their name or number at the very top of the chat screen — this opens their contact card. Scroll down until you see the red Block Contact button and tap it. A confirmation message will appear asking if you're sure; tap Block again to confirm.

On Android, the steps are identical. On iPhone, the process is the same: open the chat, tap the contact name at the top, scroll to find Block Contact, and confirm. After you block someone, their chat stays in your message list but you won't receive notifications from them anymore.

How to block someone from your contacts list

You don't have to open a chat to block someone. Go to the Contacts tab in WhatsApp (on Android, this is usually a separate section; on iPhone, tap the icon that looks like a person). Find the contact you want to block, tap their name to open their card, scroll down, and tap Block Contact. This method works the same way as blocking from a chat.

If you want to block multiple people, you'll need to repeat this process for each one — WhatsApp doesn't have a way to block several contacts at once.

How to block someone on WhatsApp Web or Desktop

Open WhatsApp Web or the desktop app and find the chat with the person you want to block. Right-click on their name in the chat list (on Mac, you can also click and hold). A menu will appear with options including Block. Click Block, and a confirmation window will pop up. Click Block again to confirm.

Blocking on the web or desktop version syncs when ready to your phone. If you block someone on your phone, they're blocked on WhatsApp Web too, and vice versa. You only need to block them once across all your devices.

What happens after you block someone

Once blocked, the person cannot send you messages, make calls, or see your profile updates. They won't see your profile photo, status, or last-seen time. If they try to message you, their message will show one checkmark (sent) but never a second checkmark (delivered). If they call you, the call won't go through and they'll hear it ringing on their end, but you won't receive it.

The blocked person can still see old messages you sent them before the block took effect. They can also still see group chats you're both in, but they won't be able to message you directly or see your individual profile. If you're in a group together, they'll see your messages in the group but won't be able to contact you privately.

How to unblock someone

Open WhatsApp and go to Settings (the gear icon on Android, or Settings in the menu on iPhone). Tap Account, then Privacy, then Blocked Contacts. You'll see a list of everyone you've blocked. Find the person you want to unblock and tap their name, then tap Unblock.

Unblocking someone restores their ability to contact you, but it doesn't restore deleted messages or chats. If you deleted the conversation before blocking them, you'll start fresh with an empty chat when they message you again. Unblocking is when ready and takes effect across all your devices.

When to block versus mute or archive

Block someone if you don't want them to contact you at all and you want to stop seeing their messages. Mute a chat if you want to keep receiving messages but don't want notifications — useful for group chats that are active but not urgent. Archive a chat if you want to clean up your message list but might want to find the conversation later; archived chats reappear at the top when that person messages you again.

You can also mute and archive the same chat. For example, you might mute a work group chat and archive it so it doesn't clutter your main list, but you'll still receive messages and can find it by searching. These options give you control over what you see without cutting off contact entirely.

Frequently Asked Questions

Will the person know I blocked them?

WhatsApp doesn't send a notification when you block someone, but they'll figure it out. Their messages will show only one checkmark instead of two, their calls won't connect, and they won't see your profile photo or status updates. Over time, they'll realize they can't reach you.

Can I block someone and still see their messages?

No. When you block someone, you won't receive their messages at all. If you want to see what they send but don't want them to know you're reading it, mute the chat instead of blocking it.

What if I block someone by accident?

Go to Settings, Account, Privacy, Blocked Contacts, find their name, and tap Unblock. It takes a few seconds and they'll be able to contact you again when ready. Your old messages with them will still be there unless you deleted them before blocking.

Can I block someone in a group chat?

Yes, blocking works the same way in group chats. They'll still see your messages in the group and you'll see theirs, but they won't be able to message you privately. If you want to remove them from the group entirely, you need to be the group admin.

Does blocking someone delete our chat history?

No. Blocking only stops them from contacting you going forward. Your old messages with them stay in your chat list unless you manually delete the conversation. If you delete the chat and then unblock them later, the messages are gone.