I regularly work with diagrams across different tools — Excalidraw in Obsidian for quick sketches, Draw.io for detailed architecture diagrams, and Mermaid for documentation. The problem was obvious: these tools don't share a common format. Every time I needed to move a diagram from one tool to another, I had to redraw it from scratch.
So I built Orriguii Diagram Converter — a simple tool that converts between these formats automatically. It runs entirely in your browser, so your files never leave your device.
Orriguii Diagram Converter handles bidirectional conversion between five diagram formats:
Drop a file in any of these formats, pick your target format, and download the converted result. Batch conversion is supported — you can convert multiple files at once.
All conversion happens in your browser using JavaScript. No files are uploaded to any server. No data is collected. No account is needed. The tool works offline once loaded.
This project is built and maintained as an open-source tool. You can find the source code and contribute on GitHub.
If you find a bug or have a feature request, feel free to open an issue on the repository.