Blocking stops someone from contacting you, but they won't know it happened
When you block a contact on WhatsApp, that person 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 — their messages will straightforward fail to send, and they'll see only a single checkmark instead of the double checkmarks that mean delivery succeeded. The block is silent and permanent until you choose to unblock them.
Blocking is different from muting or deleting a chat. Muting a conversation stops notifications but the person can still reach you. Deleting a chat just removes it from your screen — the person can still message you. Blocking is the only option that prevents contact entirely.
Key Takeaways
- You can block someone directly from their contact card or from within an open chat with them.
- A blocked person's messages won't reach you, and they won't see that their messages failed to send — they'll see a single checkmark instead of two.
- Blocking someone doesn't delete your chat history with them, but you won't see new messages from them arrive.
- You can unblock someone at any time from your phone's settings, and they'll be able to contact you again when ready.
How to block someone from their contact card
Open WhatsApp and go to the Chats tab. Find the person you want to block and tap and hold their name until a menu appears. Tap "More" (the three dots) and select "Block contact." A confirmation window will appear asking if you're sure — tap "Block" again to confirm.
On iPhone, the steps are nearly identical. Open WhatsApp, find the contact in your Chats tab, swipe left on their name, and tap the block icon (a circle with a slash through it). Confirm when prompted.
How to block someone from an open chat
If you have an active conversation with the person, you don't need to go back to your contact list. Open the chat, tap their name at the top of the screen, and scroll down to find the "Block Contact" button. Tap it and confirm.
On iPhone, open the chat, tap their name at the top, scroll to the bottom, and tap "Block This Contact." The confirmation step is the same.
What happens to your existing messages
Blocking someone doesn't erase your chat history with them. All the messages you've exchanged will still be in your WhatsApp, and you can read them whenever you want. The blocked person cannot see your messages, and you won't receive any new messages from them — they'll be rejected by WhatsApp's servers before they reach your phone.
If you later unblock the person, you'll see the full conversation history again, and they'll be able to message you normally. There's no gap or indication in the chat that a block occurred.
How to unblock someone
Open WhatsApp and tap Settings (the gear icon on Android, or the three dots on iPhone). Go to Account, then Privacy, then Blocked Contacts. You'll see a list of everyone you've blocked. Tap the person you want to unblock and select "Unblock Contact."
Once you unblock someone, they can when ready send you messages and call you again. They won't be notified that you've unblocked them, but they may notice their messages start going through again if they've been trying to reach you.
What a blocked person sees on their end
When someone you've blocked tries to message you, their message will appear to send normally on their screen — they'll see the double checkmarks that usually mean the message was delivered. However, the message never actually reaches you. If they try to call you, the call will fail to connect, and they may see an error message or the call may ring once before disconnecting.
A blocked person cannot see your profile picture, status updates, or last-seen timestamp. If they visit your contact card, they won't see these details. They also can't add you to group chats, though they can still see groups you're both members of and read messages you post there.
Blocking in group chats
Blocking someone doesn't remove them from group chats you're both in. They can still see your messages in the group and send messages there. If you want to prevent someone from contacting you privately but don't mind them being in shared groups, blocking works for that purpose — it only stops one-on-one contact.
If you want to remove someone from a group entirely, you need to use the group settings instead. Open the group, tap the group name at the top, and look for the option to remove members. Only group admins can remove people.
Frequently Asked Questions
Will the person know I blocked them?
No. WhatsApp doesn't send a notification when you block someone. They'll only realize it if they notice their messages aren't being delivered (single checkmark instead of double) or if they can't reach you by phone. Many people won't notice at all.
Can I block someone without deleting our chat?
Yes. Blocking and deleting are separate actions. Your entire message history with that person stays on your phone even after you block them. You can read old messages whenever you want, and if you unblock them later, the conversation is still there.
What if I block someone by accident?
Go to Settings, then Account, then Privacy, then Blocked Contacts. Find the person's name and tap "Unblock Contact." They'll be able to message you when ready, and you'll see any messages they send after you unblock them.
Can I block someone from seeing my status or profile picture?
Blocking prevents them from seeing your status and profile picture, but it's a complete block — they also can't message you or call you. If you only want to hide your status from certain people without blocking them entirely, go to Settings, then Privacy, then Status, and choose who can see it.
Does blocking work the same way on WhatsApp Web?
Yes. You can block someone through WhatsApp Web the same way you would on your phone. Open the chat, click their name, and select "Block Contact." The block applies across all your devices — if you block someone on your phone, they're blocked on Web too.