Link: https://github.com/clinamen0/Naihe

Made a small end-to-end encrypted chat tool. No accounts, no phone numbers, you just self-host an MQTT broker and share a key with someone.
The part I think is actually useful: there's a clipboard mode where you type plaintext, it encrypts and copies to clipboard, then you paste the ciphertext into WeChat or email or whatever. The other person does the reverse. You don't even need to be using the same app.
ChaCha20-Poly1305, Argon2id, Rust + Tauri, ~5MB exe.
I know there are better tools for most threat models (Signal, Briar, SimpleX). This isn't trying to compete with them. It's for situations where you can't install a dedicated messenger or need to smuggle encrypted text through an existing channel.
No forward secrecy, no traffic obfuscation, not audited, Windows only. All documented in the README.
Unlicense. I won't maintain it. Fork it if it's useful to you.

Due to throwaway account limitations, I can't post this in many places. If you think this project is useful, feel free to share it wherever you think it fits.

Reminds me of an android keyboard (in fdroid) that encrypts and decrypts using the clipboard, much like this. It has a "fairy tale mode" which turns the ciphertext into english gibberish about knights and princesses. Always wanted to try it out but everyone that cares is on signal already.

sounds very interesting. would you mind sharing the name of it?