What is the Personal Knowledge Base?
The Personal Knowledge Base is a private, wiki-style note organizer that lets you create interconnected pages using Markdown. Unlike cloud note apps that index and sync your content on remote servers, this tool stores all pages exclusively in your browser's localStorage. Pages persist across sessions without any login or cloud account.
Internal links between pages use a double-bracket syntax (e.g., [[Page Name]]), allowing you to build a network of connected ideas that mirrors how you actually think. All content stays on your device.
How to Use the Personal Knowledge Base
Building your personal wiki involves these steps:
- Click "New" in the left sidebar to create a new page and enter a title for it.
- Write your notes using Markdown: use # for headers, **bold**, *italic*, and - for lists.
- Link to other pages by typing [[Page Name]] anywhere in your note. Click the link to navigate to that page, or create it on the fly.
- Use the sidebar search bar to filter through all your pages by title in real time.
- Click "Save" to write your changes to localStorage. Click "Cancel" to discard edits.
- Use the delete button to permanently remove a page you no longer need.
Key Features
- Wiki-Style Internal Links: Connect pages using [[Bracket Syntax]] to build a personal web of ideas.
- Markdown Rendering: Supports headers, bold, italic, and lists for structured note formatting.
- Real-Time Sidebar Search: Instantly filters your page list by title as you type.
- Broken Link Detection: Highlights links to non-existent pages in a different color so you can spot gaps in your wiki.
Common Use Cases
This knowledge base is helpful for the following tasks:
- Research Management: Maintaining a private network of linked notes across topics, sources, and ideas for academic or professional research.
- Technical Documentation: Building an internal reference wiki for system architecture, API notes, or project specifications.
- World-Building: Keeping track of characters, locations, and lore for fiction writing or game design using linked pages.
Frequently Asked Questions
Is there a limit to how many pages I can create?
No. You can create thousands of pages. Because the data is text-only localStorage, the storage footprint is minimal and search remains fast.
Can I export my knowledge base?
A dedicated export feature is in development. In the meantime, you can access all page data via the browser's developer tools under Application > localStorage.
What happens if I clear my browser data?
Clearing site data for 99tool.in will erase all pages. Export your notes before performing a browser reset.
Does it sync between devices?
No. The knowledge base is intentionally local-only to protect your privacy. You can manually copy notes between devices.
Privacy & Data Note
All page content, internal links, and search queries are handled entirely inside your browser's localStorage. No notes are transmitted to any server, synced to any cloud, or indexed by any external service.
Frequently Asked Questions
No. You can create literally thousands of interconnected pages in our wiki. Because it is purely text-based, your entire knowledge management tool library takes up very little space in your browser's memory, ensuring lightning-fast search and retrieval.
Yes. Our knowledge base supports Markdown conventions including headers (#), bold (**), italics (*), and lists. Combined with our personal wiki linking, this allows you to create professionally formatted, interconnected documentation.
Because privacy is paramount, we don't sync your notes to any cloud. To back up your library, you can manually copy the localStorage contents via browser developer tools. A dedicated JSON export feature is planned for a future update.
🔒 100% Local. No login. No sync. Just pure information at your fingertips. Last updated: April 10, 2026.