[HackMD](https://hackmd.io) helps developers write better documents and build active communities with open collaboration.
HackMD is built with one promise - **You own and control all your content**:
- You should be able to easily [download all your online content at once](https://hackmd.io/c/news/%2Fs%2Fr1cx3a3SE).
- Your content formatting should be portable as well. (That's why we choose [markdown](https://hackmd.io/features#Typography).)
- You should be able to control your content's presentation with HTML, [slide mode](https://hackmd.io/p/slide-example), or [book mode](https://hackmd.io/c/book-example/).
With the same promise of you owning your content, CodiMD is the free software version of [HackMD](https://hackmd.io), developed and opened source by the HackMD team with reduced features, so you can use CodiMD for your community and own your data. *(See the [origin of the name CodiMD](https://github.com/hackmdio/hackmd/issues/720).)*
CodiMD is perfect for open communities, while HackMD emphasizes on permission and access controls for commercial use cases.
HackMD team is committed to keep CodiMD open source. All contributions are welcome!
If you want to spin up an instance and start using immediately, see [Docker deployment](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-documentation#Deployment).
If you want to contribute to the project, start with [manual deployment](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-manual-deployment).
CodiMD is highly customizable, learn about all configuration options of networking, security, performance, resources, privilege, privacy, image storage, and authentication in [CodiMD Configuration](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-configuration).
Join our contributor community! Start from deploying [CodiMD manually](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-manual-deployment), [connecting to your own database](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-db-connection), [learn about the project structure](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-project-structure), to [build your changes](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-webpack) with the help of webpack.
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