massCode 6.3.1 for Mac

Mac Utilities

Updated Aug 10, 2026

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massCode began as a place to keep code snippets, and it has grown into a full developer workspace for the Mac. Snippets, Markdown notes, API requests, diagrams and calculations all live together in one window. Everything is stored as plain Markdown files in a vault folder on your own disk, so your library stays readable outside the app and works fully offline with no account to create.

Key Features

• Snippet library with folders, tags and several fragments under a single snippet
• Markdown notes stored as plain files in a local vault that you own
• Built in HTTP client for saving and sending API requests beside your notes
• Syntax highlighting for more than 160 grammars in the code editor
• Extensions for VS Code and Raycast that bring your snippets into your daily tools

How to Download

1. Use the download button on this page, or Download from the official site to get the Mac build.
2. Open the downloaded file and move massCode into your Applications folder.
3. Launch the app and choose a folder for your vault, then start adding snippets and notes.

System Requirements

massCode runs on a Mac with a recent version of macOS and needs only modest disk space for the app and your vault. It works offline once installed.

FAQs

Is massCode free to use?

Yes. massCode is free and open source under the AGPL v3 licence, with no account or subscription needed.

Where does massCode store my snippets?

Your snippets and notes are stored as plain Markdown files in a vault folder on your Mac. You can back that folder up or sync it with a service you already trust.

Can I import snippets from other tools?

Yes. massCode can import VS Code and Raycast snippet files, SnippetsLab files, public Gist links and Markdown folders.