A free, open-source code snippet manager to create, organize, and instantly access your personal snippet library.
Built with Electron, Vue & Codemirror.
Inspired by applications like SnippetsLab and Quiver.
Latest Release | Documentation | Change Log
SPONSORS
massCode is an open-source project and completely free to use.
Maintaining and adding new features requires significant time and effort. If you find massCode useful, consider supporting its development. Your contribution helps keep the project alive and moving forward.
You can support massCode through the following channels:
Organize your snippets with multi-level folders and tags. Each snippet can contain multiple fragments (tabs), giving you fine-grained control over structure and grouping.
Built on CodeMirror with .tmLanguage grammars for syntax highlighting.
- Supports over 600 grammars, with 160+ available out of the box.
- Integrated Prettier for clean, consistent code formatting.
Write and instantly preview HTML and CSS snippets. Perfect for prototyping, testing ideas, or quick visual checks.
Full Markdown support with syntax highlighting, tables, lists, and more.
- Integrated Mermaid for dynamic diagrams and charts.
Turn a sequence of snippets into a presentation. Useful for classrooms, team meetings, conference talks, or simply walking through your own notes.
Generate mind maps from Markdown. Fast, intuitive, and ideal for structuring and visualizing ideas.
Extend your workflow with:
- VS Code Extension: zen mode snippet search, instant insertion, and save selected code as snippets.
- Raycast Extension: quick snippet access directly from Raycast.
Export snippets as polished images with customizable themes and backgrounds.
Handy built-in utilities for everyday dev tasks:
- Text Tools: Case Converter, Slug Generator, URL Parser
- Crypto & Security: Hash/HMAC, Password Generator, UUID
- Encoders/Decoders: URL, Base64, JSON ⇄ TOML/XML/YAML, Text ⇄ ASCII/Binary/Unicode, Color Converter
massCode was created as a personal learning project and evolved into an open-source tool. The goal: combine the best features of snippet managers (free and paid) into one flexible, developer-friendly application.
- Node.js (>=20.16.0)
- pnpm (>= 9.0.0)
pnpm installTo build for current platform:
pnpm buildTo build for a specific platform:
pnpm build:mac # macOS
pnpm build:win # Windows
pnpm build:linux # LinuxTo run in development mode:
pnpm devThis will start the application with hot reloading.
If you encounter the error message "massCode" is damaged and can't be opened. You should move it to the Trash while installing software on macOS, it may be due to security settings restrictions in macOS. To solve this problem, please try the following command in Terminal:
sudo xattr -r -d com.apple.quarantine /Applications/massCode.app- News and updates on X.
- Discussions.
Copyright (c) 2019-present, Anton Reshetov.
