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TikZJax Next is an Obsidian plugin that draws TikZ and LaTeX diagrams in your notes. You write the code in a tikz code block and the note shows the picture. TeX runs inside the plugin, compiled to WebAssembly, so there is nothing else to install and nothing leaves your device. It works offline, on desktop, iPhone and iPad.

Three of the repository's test diagrams, as the plugin's own engine draws them.

To install it, open Settings → Community plugins → Browse in Obsidian and search for TikZJax Next. It needs Obsidian 1.7.2 or later. The README shows how to write a diagram and lists every bundled package and library.

If a diagram does something you did not expect, ask in Q&A. If you would like the plugin to do something it does not, post it in Ideas, where others can vote on it. Bugs and requests for a missing package go in Issues, which has a form for each.

Status says what works today and what does not. Roadmap is what I am doing next, and in what order. How it works follows one diagram from the code block to the picture.