MassCode

A developer workspace that consolidates code snippet management, markdown notes, HTTP requests, calculations, diagrams, and developer tools into one offline application. It targets individual developers and engineering teams seeking a local, open-source alternative to fragmented online tools. The product is delivered as a free, open-source desktop app that stores data locally in plain Markdown files, with optional integrations for VS Code and Raycast.

Key features

• Organize snippets with folders, tags, fragments
• Edit snippets with CodeMirror
• Format code with Prettier
• Preview HTML and CSS in real time
• Inspect JSON visually
• Export polished code screenshots
• Write Markdown with live preview
• Add status, priority, due dates to task notes
• Use Mermaid diagrams and mindmaps
• Fullscreen presentation mode
• Save and send API requests
• Organize requests in folders
• Switch environments
• Preview outgoing HTTP or cURL
• Inspect responses
• Import collections from OpenAPI, Postman, Bruno
• Natural-language math calculations
• Sketch diagrams on Excalidraw canvas
• Searchable list of drawings
• Export drawings as images
• Embed drawings in Markdown notes
• Convert, encode, hash, generate data
• Tools for JSON, Base64, URLs, colors, passwords, UUIDs
• Import snippets from VS Code, Raycast, SnippetsLab, GitHub Gists
• Import Obsidian markdown folders
• VS Code extension for searching snippets
• Raycast extension for quick access
• Store data as plain Markdown files
• Sync with iCloud, Dropbox, or Git
• Available in 15 languages