hedgedoc.org

What It Is

HedgeDoc, formerly known as CodiMD, is an open-source, web-based, self-hostable collaborative Markdown editor. It is designed for users who need to co-edit notes, diagrams, and even presentations. Its core idea is to lower the barrier to collaboration through the browser and link sharing: users simply send a note-link to colleagues, and they can join the collaboration.

Core Features and Collaboration

HedgeDoc’s main features center on real-time Markdown editing. The official website highlights modules such as Web-based, Real-time collaboration, Presentation mode, Graphs & diagrams, and Revisions. Presentation mode is powered by reveal.js, allowing Markdown content to be converted into slides. Support for diagrams and embedded content also makes it suitable for technical documentation and project briefs. For permissions, it provides a note permission system with a “simple dropdown,” and its documentation mentions that editing can be restricted to logged-in users only. The revision feature can track changes and roll back to older versions, which is very useful in multi-user editing scenarios.

Pricing, Deployment, and Security

Based on the available information, HedgeDoc is a FOSS community-driven project. Its source code is available on GitHub under the AGPL 3.0 license, and there is no information about commercial plans, paid editions, or hosted pricing. Deployment is centered on self-hosting, with ready-made bundles and Docker images available. Resource requirements are relatively low, and it can even run on a Raspberry Pi. In terms of security, self-hosting means data can remain on your own server. However, the official Demo is explicitly not recommended for production use or private notes, as it runs unstable code and uses Cloudflare; Cloudflare intercepts TLS traffic between the browser and the Demo.

Pros, Cons, and Who It’s For

Its strengths include being open-source and free, flexible deployment, straightforward real-time collaboration, rich Markdown capabilities, and community support via GitHub, documentation, FAQ, Matrix, Discourse, and more. Its limitations are that the official site does not disclose enterprise SLA, commercial support, compliance certifications, complex RBAC, auditing, or API/SDK information; the Demo also does not provide reliability or privacy guarantees. HedgeDoc is better suited to technical teams, open-source communities, educational organizations, or small and midsize teams that want control over their own data, for use cases such as meeting notes, technical documentation, knowledge bases, and Markdown presentations.

Access in China and Alternatives

The official website does not provide information on mainland China access, payment, or localized hosting, so its accessibility should be considered unknown. Since it can be self-hosted, teams in China can deploy it on their own servers to improve access performance. If you need a more mature SaaS offering, mobile ecosystem, or support for domestic payments and compliance, you may want to compare it with HackMD, Notion, Outline, Wiki.js, BookStack, 语雀, or 飞书文档.