TeXbrain: A new open-source LaTeX editor compiles documents in-browser via WASM

In-Browser LaTeX Compilation

TeXbrain is a new open-source LaTeX editor that performs all compilation processes directly within the user's browser. It utilizes a WebAssembly port of pdfTeX, named SwiftLaTeX, to convert .tex files into PDFs without sending data to a remote server. This client-side approach ensures that files remain on the user's machine throughout the editing and compilation workflow.

Key Features and Functionality

The editor includes a range of features designed for a comprehensive LaTeX experience. It offers full Git integration, allowing users to clone repositories, create branches, commit changes, and push/pull from GitHub directly within the browser. TeXbrain also supports local file system access via the File System Access API, enabling direct reading and writing to project folders on disk in compatible browsers like Chrome and Edge. Packages from CTAN are loaded on demand and cached locally for subsequent offline use.

Addressing User Pain Points

The developer created TeXbrain to address common frustrations with existing LaTeX tools, such as paywalls for essential features like Git synchronization in online solutions and setup complexities with local installations. By operating entirely in the browser without accounts or server dependencies, TeXbrain provides a free, accessible, and self-contained environment for LaTeX document creation.

Technical Implementation

The application's architecture is entirely client-side, meaning the editor, compiler, and Git client all run within the browser. This design eliminates the need for a backend server to process user files. The editor itself is built on CodeMirror 6, offering features like syntax highlighting, autocomplete for over 70 LaTeX commands, and dark/light themes. PDF previews are rendered using pdf.js, providing multi-page, zoomable, and text-selectable views.