LaTeX Autofill

LaTeX Autofill is an open source Obsidian plugin that brings IDE-style autocomplete to LaTeX math blocks. When you type inside a math environment, a completion list pops up at the cursor much like code completion in an IDE, and every command can be found by its English name, its Chinese name, or the raw LaTeX command itself.

Unlike most LaTeX completers that only match command names, LaTeX Autofill matches what you mean: typing a phrase like "partial derivative" or its Chinese equivalent inserts a complete formula template with placeholders you can Tab through, walking through every argument and every matrix cell. It ships 236 curated entries covering operators, relations, sets, logic, arrows, brackets, fonts, accents, functions, matrices, environments, spacing, probability, and the Greek alphabet, ranked above the plain command list, plus the full Completr command list for when you already know the command name.

It works as soon as it is enabled, runs fully offline with no AI involved, and needs no configuration. Insertion is placeholder-aware with Tab and Shift+Tab navigation, nested completions keep outer placeholders intact, and multi-line environments are flattened to one line inside inline math. There is also a searchable "Search LaTeX" window for browsing all entries, with options to insert, insert wrapped in inline math, or copy. Interface language follows the Obsidian language setting, showing Chinese or English names natively while search always accepts both.

As a free comparison to commercial equation editors like MathType, it is not a WYSIWYG toolbar but a keyboard-driven alternative for people who write math in Markdown: rather than clicking through a symbol palette in a paid Office add-in, you type what you want and pick from a list, staying entirely inside your Obsidian notes.