Johnny.Decimal is a system that helps you be more organised. It gives you a simple structure so you can easily find your stuff. Everything gets an ID like 11.21 Health records & registrations.

The system is free. Use it at home or work. It works best with an app like Obsidian, but use whatever you want. You control your own data.

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The Johnny.Decimal system Documentation is here. Start with the Introduction and work your way through it.

There's a Blog. The latest post is I gave Claude my Johnny.Decimal index (video), published yesterday.

The online Workbook · free is a step-by-step guide to building a Johnny.Decimal system. If you prefer, you can download the PDF.

Our pre-built systems save you time: we spent hundreds of hours designing them so you don't have to.

Everyone has life admin, usually spread across cloud drives, download folders, and ten years of email. The Life Admin System gives you a place for everything: download it and move in.

You started a business because there's a thing that you do better than anyone else. The Small Business System deals with the boring admin that we all share – it runs our business.

To build your own system with Lucy, follow the 5-hour Workshop.

To achieve a 'comfortable awareness' of everything you need to get done, take the 5-hour Task and Project Management course.

There are more video series. To view them all, visit the Johnny.Decimal University home page.

Command-line documents tools and tweaks for the terminal. Query the site (and maybe your own data in the future) with the API.

LLMs love structure. AI & LLMs help yours use the system. The site has an MCP server that covers the documentation, blog, all of our products, and 5+ years of my other writing.

Under development. More coming in 2026.

Ask questions and share your system on the forum. If you prefer chat, we're on Discord (join the server first).

Subscribe to the YouTube channel where I post tutorials and advice. And you can always email me. I answer every message personally.

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