MorseModem

Share secrets as voice memos. In Morse code.

MorseModem lets you send hidden messages through any messaging app. Type your text, encode it as Morse code audio, and share it as a regular voice memo. Only someone with MorseModem can decode it. To everyone else, it sounds like beeps.

Works with WhatsApp, iMessage, Signal, Messenger, and any app that supports voice memos.

ENCODE
Type a message and convert it to Morse code audio. Feel each dot and dash through haptic feedback as your secret takes shape. Share the result as a voice memo -- it blends right in.

DECODE
Received a Morse voice memo? MorseModem auto-detects the tones, calibrates the timing, and reveals the hidden message.

LEARN
New to Morse code? Browse the built-in guide covering letters, numbers, and punctuation. Tap any character to hear how it sounds.

PRIVATE BY DESIGN
- 100% offline -- no servers, no internet required
- No data collected
- No tracking
- No ads
- Open source

Your messages never leave your device. Nothing is stored, sent, or analyzed by us. Ever.

Available in English and French.