Crypt Chat Online: Free Encrypted Chat Room in Your Browser (2026)

What is Crypt Chat?

Crypt Chat — the name many people type when they look for ChatCrypt — is the free encrypted chat room built into ToolsWebPro. It is designed for one job: letting two or more people talk privately for a short time, from any modern browser, without creating accounts or handing over phone numbers.

You create a room, copy the invite link, and send it to the people you trust. Everyone who opens the link joins the same room, and every message is encrypted on the sender's device before it leaves the browser.

Direct answer: To start an encrypted chat online for free, open Crypt Chat (ChatCrypt), click Create Chat Room, and share the invite link. Messages are encrypted with AES-256-GCM in your browser, the decryption key travels only inside the link's # fragment, and the conversation clears when you refresh.

How to start an encrypted chat online in 3 steps

• Open the Crypt Chat room tool and click Create Chat Room. Your browser generates a new room ID and a random secret key.
• Copy the invite link and send it to your contact over any channel you already use. Anyone with the full link can join, so share it only with the right people.
• Pick a temporary nickname, join the room, and start typing. When you are done, close the tab — or simply create a fresh room next time.

Want screenshots and troubleshooting for each step? See How to Create, Join, and Share a ChatCrypt Room.

How the encryption actually works

When you create a room, your browser uses the Web Crypto API to generate a random 256-bit secret. That secret is hashed with SHA-256 to produce an AES-GCM key, and every message is encrypted with that key and a fresh random 12-byte initialization vector (IV). AES-GCM also authenticates each message, so tampered ciphertext fails to decrypt instead of showing altered text.

The secret is placed after the # in the invite link (for example ...?room=ABC123#key=...). Browsers do not send the part after # to the web server when they load a page, so the server that relays messages never receives the key. It only stores and forwards encrypted blobs, which your contact's browser decrypts locally using the key from their copy of the link.

For a deeper technical walkthrough, read How Our Encrypted Chat Room Protects Your Messages.

What the server can and cannot see

Being honest about metadata matters. Here is what the relay server handles while a room is active:

What happens to your messages

• Refresh or close the tab: the conversation disappears from your screen and is not reloaded.
• 60 minutes after a room is created: the room and its stored encrypted messages are deleted from the server automatically.
• No account history: there is no profile, contact list, or chat archive tied to you.

When Crypt Chat is the wrong tool

Browser-based encrypted rooms are great for quick, one-off conversations, but they are not a replacement for everything. Anyone who gets the full invite link can read the room, so a link forwarded to the wrong person is a real risk. There is also no identity verification — you are trusting that the person who joins is the person you sent the link to — and no encryption can protect you if your own device is infected with malware.

For long-term conversations with people you talk to every day, an established messenger with verified contacts is usually the better choice. We compare the trade-offs in Chat Crypt vs WhatsApp & Telegram.

Crypt Chat, ChatCrypt, and similar names

Searches for crypt chat, chat crypt, and chatcrypt often mix up different products. ToolsWebPro's ChatCrypt lives at toolswebpro.com/tools/secure-chat-room and is not affiliated with chatcrypt.com or any other service with a similar name.

If you want the no-phone-number angle in more detail, read ChatCrypt: Encrypted Private Chat Online Without a Phone Number.

Crypt Chat FAQ