
Privacy-focused personal knowledge base
Free

思源笔记 (SiYuan Note) is a privacy-first personal knowledge management system designed for offline use and end-to-end encrypted synchronization. It combines block-based editing, outlining, and bidirectional linking to help users restructure their thinking and manage knowledge effectively. Unlike many note-taking apps, SiYuan Note prioritizes user privacy by storing data locally and offering encrypted cloud synchronization. Its unique block-based approach allows for granular organization and flexible content manipulation, making it ideal for long-form writing and complex knowledge structures. The system's features include a focus mode for individual blocks, support for rich media, and integration with AI for tasks like summarization and translation. SiYuan Note is designed for individuals who value privacy and seek a powerful, flexible tool for personal knowledge management.
SiYuan Note's core is its block-based editor. Every element, from paragraphs to images, is a block. This allows for granular organization and manipulation of content. Users can easily rearrange, split, and merge blocks, providing unparalleled flexibility in structuring notes. The system supports over 20 block types and 10 inline element types, offering a rich set of formatting options.
The bidirectional linking feature allows users to connect ideas and concepts by creating links between blocks and documents. This creates a web of interconnected knowledge, making it easier to discover relationships and build a comprehensive understanding of a topic. The system provides a backlinks panel to view and manage these connections, enhancing knowledge discovery.
SiYuan Note prioritizes privacy by offering full offline functionality. All data is stored locally by default, ensuring that users retain complete control over their information. For cloud synchronization, end-to-end encryption is implemented, protecting data from unauthorized access, even if the cloud service is compromised. This is a crucial differentiator from many cloud-dependent note-taking apps.
SiYuan Note provides robust outlining capabilities, allowing users to structure their notes hierarchically. This feature is ideal for organizing complex information, creating to-do lists, and managing projects. The outline view supports folding and unfolding sections, making it easy to navigate and focus on specific parts of the document. The system also supports rich formatting within list items.
SiYuan Note integrates with AI to enhance productivity. Users can leverage AI for tasks such as text summarization, translation, brainstorming, and grammar correction. This integration streamlines the note-taking process and helps users extract key insights from their notes. The AI features are designed to be a helpful assistant, not a replacement for human thought.
A student uses SiYuan Note to organize lecture notes, research papers, and personal reflections. They create interconnected links between ideas, build a comprehensive knowledge base, and use the outlining feature to structure complex topics for study and review, improving comprehension and retention.
A project manager uses SiYuan Note to outline project tasks, track progress, and link related documents. They use the block-based editor to create detailed task descriptions and the bidirectional linking feature to connect tasks with relevant resources, improving project organization and collaboration.
A writer uses SiYuan Note to draft articles, blog posts, and books. They utilize the block-based editor to structure their content, the bidirectional linking feature to connect ideas, and the AI integration to assist with writing and editing. This streamlines the writing process and improves content quality.
A researcher uses SiYuan Note to collect and organize research notes from various sources. They create links between notes, articles, and ideas, building a comprehensive knowledge base. The outlining feature helps structure complex research topics, and the AI integration assists with summarizing and extracting key information.
Students and researchers benefit from SiYuan Note's ability to organize complex information, create interconnected knowledge bases, and structure notes for effective study and research. The focus on privacy and offline access ensures data security and accessibility.
Writers and content creators can use SiYuan Note to draft articles, blog posts, and books. The block-based editor and bidirectional linking features streamline the writing process, while AI integration assists with editing and content improvement, enhancing productivity.
Project managers and professionals can leverage SiYuan Note to organize project tasks, track progress, and link related documents. The outlining and bidirectional linking features improve project organization, collaboration, and knowledge management.
Individuals who prioritize privacy and data security will find SiYuan Note appealing. The offline functionality, end-to-end encryption, and local data storage ensure that personal information remains secure and under the user's control.
Free to download and use. Offers end-to-end encrypted synchronization for data backup and access across devices.