I got tired of opening .md files in Notepad and seeing raw syntax everywhere, but Obsidian felt like overkill when I just wanted to edit one file. So I built Paperling. It renders math, chemistry, Mermaid diagrams and code live as you type. There's an optional AI that proposes edits as inline diffs you accept or reject, and it works with any OpenAI compatible endpoint including local models. Built with Tauri and Rust so it's fast and tiny. Free, open source, Windows, macOS and Linux.
