massCode
About massCode
massCode is a free, open-source developer workspace that combines snippets, notes, HTTP requests, calculations, and developer tools in one local-first application. It allows users to organize and manage code snippets, notes, and API requests efficiently while keeping all data on their machine as plain Markdown files.
The application supports multiple platforms including macOS, Windows, and Linux. It features a variety of tools such as a code snippet manager with syntax highlighting, an HTTP client for API testing, and a math notebook for calculations. The workspace is designed to be local-first, ensuring data privacy and control.
massCode also includes developer utilities like JSON diff, text manipulation tools, and cryptographic functions. These tools are integrated into the workspace to minimize context switching and enhance productivity. The application is extensible with VS Code and Raycast extensions available for further customization.
Key features
- Code snippets with multi-level folders, tags, and fragments
- HTTP client for organizing and testing API requests
- Math notebook for calculations and conversions
- Drawing tools for diagrams and wireframes
- Developer tools including JSON diff and text utilities
Download v5.8.0
Jul 6, 2026macOSmacOS
LinuxLinux
Frequently asked questions
- Is massCode free?
- Yes. massCode is free and open-source software, distributed under the AGPL-3.0 license.
- Which platforms does massCode support?
- massCode provides downloads for Windows, macOS, Linux.
- What is the latest version of massCode?
- The latest version is v5.8.0, released on Jul 6, 2026.
- What platforms does massCode support?
- massCode is available for macOS, Windows, and Linux.
- How is data stored in massCode?
- All data is stored locally as plain Markdown files, ensuring it stays on your machine.
- Is massCode free to use?
- Yes, massCode is free and open-source, though donations are accepted to support development.
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