Last weekend I hacked together a fun little tool based on an idea I had — watermarking internal messages textually.

The concept:

- You write an internal message (e.g. a sensitive update).

- The tool generates multiple unique, paraphrased templated variants.

- You send a different version to each recipient.

- If one leaks (e.g. a screenshot), you can visually identify which version it was and who it was sent to.

I posted it on Reddit (/r/sideprojects) and it got 70k views, so figured I’d share it here too!

It’s:

- Very early and buggy

- Fully open-source

- Probably not useful for 99.99999% of people.

- Just a cool random concept I wanted to experiment with

Repo: https://github.com/adrian-kong/ghostmark

Video demo is under the repo.

If there’s interest, I can make a live demo page so people can try it without cloning the repo using my API key instead.

Would love to hear what you think — especially around even slightest of use cases or ways to improve it!