01 / QR PAIRING
Pair from a QR code
Select or scan a pairing QR to establish a shared key with someone you trust.
Encryption keyboard app
Private messages. Your keyboard.
Murmur Input is an encryption keyboard app for Android and iPhone. Encrypt messages as emoji text and send them through compatible chat apps. Exchange encrypted messages between Android and iPhone (iOS), using compatible app versions and matching keys.
AES-256-GCM
Works offline
Use your existing chat apps
Pair privatelyExchange keys by QR code or ECDH invitation.
Encrypt while typingCompose private text without leaving your chat.
Read in contextDecrypt through the Lens or from your clipboard.
Watch the walkthrough
See Murmur Input in action.
Watch the full demonstration of pairing, encrypting, sending, and decrypting private messages with the keyboard.
One private workflow
Pair. Encrypt. Read.
Both people use compatible Murmur Input versions and the same secret key. The encrypted emoji text can travel through compatible chat, SMS, email, and text-sharing services.
02 / PRIVATE ECDH
Pair through your chat
Exchange an invitation and response, then confirm the private pairing inside your conversation.
03 / LENS
Read through the Lens
Move the floating Decryption Lens over an encrypted message to read it while you chat.
04 / COPY TO DECRYPT
Copy it. Read it.
Copy encrypted text to view the decrypted message above the keyboard, then write a private reply.
Pair from a QR code
Select or scan a pairing QR to establish a shared key with someone you trust.
Pair through your chat
Exchange an invitation and response, then confirm the private pairing inside your conversation.
Read through the Lens
Move the floating Decryption Lens over an encrypted message to read it while you chat.
Get Murmur Input
Download Murmur Input for Android and iPhone.
Get the Android app on Google Play or the iPhone and iPad app on the App Store. Tap a store badge or scan its QR code to download.
Scan to open Google Play
Android
Available on Google Play
Scan to open the App Store
iPhone & iPad
Available on the App Store
Private by design
Your message stays yours.
Murmur Input encrypts and decrypts messages on your device. Your chosen chat service carries the encrypted emoji text, not the readable message.
Read the privacy policyOn-device encryptionMessage encryption and decryption work offline after pairing.
You choose where to sendUse compatible chat, SMS, email, or text-sharing services.
Keys matterOnly someone with the matching secret key can read the encrypted message.
Murmur Input explained
Private messaging, without changing your chat app.
Clear answers about the Murmur Input encryption keyboard and its cross-platform workflow.
What is Murmur Input?
Murmur Input is a cross-platform encryption keyboard app for Android and iOS. It encrypts and decrypts messages on your device, so compatible chat services carry encrypted emoji text rather than the original message.
Can Android and iOS exchange encrypted messages?
Yes. Murmur Input supports encrypted message exchange between Android and iOS when both people use compatible app versions and the matching secret key.
Does message encryption work offline?
Encryption and decryption run on your device after pairing. Sending the encrypted text still uses the normal connection required by your chosen chat or messaging service.
How do people pair securely?
Pair by sharing a QR key with someone you trust or by exchanging and confirming a private ECDH invitation and response through chat.