Building a native macOS Markdown editor for files, not databases

I'm an indie designer/dev building a native Markdown editor for macOS.

Not because the world needs another editor—because I wanted something that treats Markdown as documents.

Why native macOS, file-first

• Standard macOS document workflow for .md/.markdown
• Table of contents sidebar generated from headings
• Live Preview with syntax highlighting + KaTeX
• Mermaid diagrams support (preview/export)
• Optional AI rewrite assistant with a diff preview so you can review changes before applying them
• Subtitle workflows: open/save .srt and .vtt with timestamp coloring

I'm trying to keep it modest and ship quietly: small improvements, avoid hype, let feedback drive the roadmap.

If you want to peek: https://ink.litsquare.com