Show HN: Convert between Mermaid, draw.io, and Excalidraw diagrams

Hi HN, I built a diagram converter that translates between Mermaid, draw.io, and Excalidraw.

What it does: 1.Converts between Mermaid, draw.io, and Excalidraw formats 2.Currently supports: Flowcharts and graph-based diagrams 3.Preserves semantic structure and layout in most cases.

Why I built it: Honestly, I was tired of copy-pasting and redrawing diagrams when switching contexts. Plus, many AI coding tools (Claude, Cursor, etc) only generate Mermaid diagrams inside the chat, and sometimes I want the diagrams to be more verbose.

Current state: Working MVP with Flowcharts and graph-based diagrams support

What I'm asking: 1.Does this solve a problem you actually have? 2.What formats/features would make this essential for your workflow? 3.Any issues/bugs/potential improvements you observe?

I'd love honest feedback—even if it's "this isn't useful because X." Trying to validate if this is worth building out further or if I should pivot to something else.