Binary Decimal

Online tools, for everything

7 followers

Online tools, for everything

7 followers

Explore powerful online calculators: Base Converter, Physics Unit Converter, Scientific Calculator, Mortgage Calculator, and more. In addition to this, you would have arguable one of the best lean markdown-based note-taking app.

This is the 2nd launch from Binary Decimal. View more

Binary Decimal - Markdown Editor

Launching today

Your private Notion-style workspace - no login, no cloud

Most markdown editors are just a text box. This one feels like a lightweight Notion + Obsidian but private. Organize your notes with a multi-document sidebar, write in clean markdown with a live preview, and visualize ideas with built-in Mermaid diagram support. Everything is stored locally, nothing ever leaves your browser. No login, no account, no cloud. Just a fast, private scratchpad that's ready the moment you open it. Perfect for quick notes or just using as scratchpad compatible with LLMs

Binary Decimal - Markdown Editor gallery image

Free

Launch tags:Productivity•Writing•Developer Tools

Launch Team

Spotlight by BackplanesMake every Claude Code & Codex session better than the last

Promoted

Maker

📌

Hey hunters! 👋 I built this because I kept reaching for Notion or Obsidian just to jot down quick notes — but didn't want the login, the sync, or my thoughts living on someone else's server. So I made a Notion-style markdown editor that lives entirely in your browser. Multi-document sidebar, live preview, Mermaid diagram support — and zero data ever leaves your machine. No account needed, just open and write. It's been my daily scratchpad for a while now and I wanted to share it. Would love to hear what features you'd want next — keyboard shortcuts, themes, export options? Drop a comment and let me know! 🙌

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16h ago

Previous Binary Decimal Launches

Binary DecimalOnline tools, for everything

Launched on June 18th, 2025