I built a VS Code extension for this a while back, and after switching to Neovim, I rebuilt it as a native plugin using extmarks.

It visually masks sensitive values in .env, JSON, YAML, TOML files without modifying the actual content. Useful for screen sharing, recording tutorials, or taking screenshots.

Features: - Multiple formats (.env, .json, .yaml, .toml, .properties) - Multiple styles (stars, dots, scramble) - Custom colors - Telescope/Snacks picker integration - Zero file modification

Would love feedback!