About CodeInk
CodeInk is a free, open-source Markdown editor built for developers and technical writers. A clean, professional interface with real-time preview, Mermaid diagrams, KaTeX math, syntax highlighting, and markdown linting — all running in your browser with zero server-side processing.
Why I built CodeInk
I wanted a Markdown editor that was fast, private, and had the features I actually use: diagrams, math, and proper syntax highlighting. Most online editors either require an account, track you with analytics, or lack modern features like Mermaid support. CodeInk is the editor I wanted to use — it gets out of your way and lets you write.
Private by architecture, not just by policy
There is no server that processes your documents. There are no analytics scripts. There are no cookies. Your documents are saved in IndexedDB in your browser and never transmitted anywhere. The editor simply cannot access your data from a server, because there is no server-side document processing.
Technology
Open source
CodeInk is fully open source under the MIT license. View the source, report issues, or contribute on GitHub.
