Launched this week
MB Viewer

MB Viewer

Preview TSX, Markdown and Mermaid files offline instantly

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MB Viewer is a free, offline-first desktop application for previewing and editing technical files. Preview TSX/JSX React components without setting up a development environment. Work with Markdown, KaTeX mathematical expressions, Mermaid diagrams, and multiple files in split or quad views. Built for developers, technical writers, researchers, and AI-assisted coding workflows. No account. No cloud dependency. Just open your files and work. Available for Windows, macOS, and Linux.

MB Viewer makers

Here are the founders, developers, designers and product people who worked on MB Viewer