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massCode
masscode.io
What it is
massCode is a free, open-source, local-first desktop workspace for code snippets, Markdown notes, HTTP requests, calculations, and developer utilities. Its Code space organizes reusable snippets with folders, search, and an editor. Notes supports Markdown documents, task status and due dates, a notes graph, mindmaps, and presentation mode. The HTTP workspace handles collections, environments, scripts, tests, sequential runs, GraphQL, and WebSocket, and imports requests from OpenAPI, Postman, or Bruno. A browser clipper can save selected code, page text, and links into Code, Notes, or HTTP. Snippets and notes are plain Markdown files in a local vault that users can read, edit, move, or back up outside the app. There is no built-in cloud account or proprietary sync, though the vault folder can be synced with external services. AI connections can use provider API keys or local models; cloud API use is billed by the provider. Downloads include macOS, Windows, and Ubuntu Linux builds, with browser extensions for Chrome, Firefox, and Safari.
Spec sheet
- What it does
- massCode is a local-first desktop workspace combining code snippets, Markdown notes, HTTP requests, calculations, drawings and developer utilities.Read 14 Oct 2026 · masscode.io
- Product
- massCode is a free, open source local-first desktop workspace for code snippets, Markdown notes, HTTP requests, calculations, and developer utilities.Read 29 Sep 2026 · masscode.io
- Privacy
- The maker says massCode collects no telemetry and tracks no users.Read 29 Sep 2026 · masscode.io
- AI integrations
- The AI assistant can connect to OpenAI, Anthropic, Gemini, DeepSeek, Mistral, or xAI using the user's API key, or to local models through Ollama or LM Studio; cloud API usage is billed by the provider.Read 29 Sep 2026 · masscode.io
- AI providers
- The AI Assistant supports OpenAI, Anthropic, Gemini, DeepSeek, Mistral, xAI, OpenRouter, Ollama and LM Studio using user supplied credentials or local servers.Read 14 Oct 2026 · masscode.io
- Browser clipper
- The Clipper extension saves selected code to Code, readable text to Notes and pages or links as HTTP GET requests.Read 14 Oct 2026 · masscode.io
- Build requirements
- Building from source requires Node.js 20.16 or newer and pnpm 9 or newer.Read 14 Oct 2026 · github.com
- Code snippets
- The Code workspace organizes reusable snippets with folders, tags, fragments, search and syntax highlighting.Read 14 Oct 2026 · github.com
- Company ownership
- The project credits Anton Reshetov as copyright holder and maintainer.Read 14 Oct 2026 · github.com
- Developer tools
- Built-in tools include JSON comparison, encoders, decoders, generators, hash utilities and text converters.Read 14 Oct 2026 · masscode.io
- Drawings
- Drawings uses an Excalidraw-powered canvas with searchable diagrams, image export and Markdown embedding.Read 14 Oct 2026 · masscode.io
- Formatting and previews
- Code includes integrated Prettier formatting plus live HTML and CSS previews.Read 14 Oct 2026 · github.com
- HTTP client
- The HTTP workspace sends HTTP and GraphQL requests, exchanges WebSocket messages, stores history and supports collections, environments and folders.Read 14 Oct 2026 · masscode.io
- HTTP imports
- Collections can be imported from OpenAPI, Postman and Bruno.Read 14 Oct 2026 · github.com
- HTTP testing
- HTTP requests can use assertions, JavaScript tests, response extraction and sequential collection or folder runs.Read 14 Oct 2026 · masscode.io
- Imports
- The HTTP workspace can import requests from OpenAPI, Postman, or Bruno.Read 29 Sep 2026 · masscode.io
- Independent feature praise
- MacUpdate highlights multi-level folders, tags, more than 160 grammars, Prettier formatting, Markdown, Mermaid, full-text search and cloud-folder synchronization.Read 14 Oct 2026 · masscode.macupdate.com
- Integration API
- The local Integration API uses a configurable port, bearer token and generated token for extensions such as Clipper.Read 14 Oct 2026 · masscode.io
- Licence
- The application is released under the GNU Affero General Public License version 3.Read 14 Oct 2026 · github.com
- License and maker
- The project is AGPL v3 and its site credits Anton Reshetov, with copyright dating from 2019.Read 29 Sep 2026 · masscode.io
- Limit: depth versus specialists
- The independent review judged that the all-in-one approach sacrifices some depth, reliability and polish compared with dedicated tools.Read 14 Oct 2026 · developers.pl
- Limit: editor bug
- The independent review cited an open Linux issue in which Live Sync could deselect the editor after typing stopped.Read 14 Oct 2026 · developers.pl
- Limit: HTTP capabilities
- The independent review reported that its HTTP client lacks the advanced authentication, scripting and testing depth the reviewer uses in Insomnia.Read 14 Oct 2026 · developers.pl
- Local storage
- Snippets and notes are stored locally as plain Markdown files in a vault that users can read, edit, move, and back up outside massCode.Read 29 Sep 2026 · masscode.io
- Maker background
- Anton Reshetov describes massCode as his largest open-source project and lists its launch in 2019.Read 14 Oct 2026 · antonreshetov.com
- Markdown notes
- Notes supports Markdown documents, tasks, links, graphs, mindmaps and presentation mode.Read 14 Oct 2026 · masscode.io
- Math notebook
- Math provides natural-language arithmetic, currency and unit conversion, date calculations and finance formulas.Read 14 Oct 2026 · masscode.io
- MCP
- A coding agent can connect through MCP to search, read, and save snippets, notes, and HTTP requests.Read 29 Sep 2026 · masscode.io
- MCP integration
- massCode exposes a local MCP server for agents such as Codex, Claude Code, Cursor and VS Code Copilot.Read 14 Oct 2026 · masscode.io
- Migration limitation
- Version 6 cannot open legacy massCode SQLite or v3 JSON libraries directly; migration requires intermediate versions 4.7.1 and 5.12.0.Read 14 Oct 2026 · masscode.io
- Notable news
- The GitHub releases page records API workflows, GraphQL, WebSocket support and code generation in a September 2026 release.Read 14 Oct 2026 · github.com
- Notes
- Notes supports Markdown documents, task status and due dates, a notes graph, mindmaps, and presentation mode.Read 29 Sep 2026 · masscode.io
- Praise: breadth
- The same independent review recognized the convenience of combining snippets, notes, HTTP, math, drawings and utilities in one application.Read 14 Oct 2026 · developers.pl
- Praise: local files
- An independent developers.pl review praised the Markdown data model because it is portable, Git-friendly and avoids vendor lock-in.Read 14 Oct 2026 · developers.pl
- Rating on MacUpdate
- 5.0 out of 5 from 2 user ratings.Read 14 Oct 2026 · masscode.macupdate.com
- Secret handling
- HTTP secret-variable values are kept outside the vault and encrypted on the device where they were entered.Read 14 Oct 2026 · masscode.io
- Security limitation
- The documentation warns that vault files are plain text and should not contain passwords, API tokens or private keys when synchronized or shared.Read 14 Oct 2026 · masscode.io
- Snippet library
- The Code space organizes reusable snippets across projects and languages with folders, search, and an editor.Read 29 Sep 2026 · masscode.io
- Storage format
- Snippets, notes and HTTP requests are stored as readable Markdown files with frontmatter in a local vault.Read 14 Oct 2026 · masscode.io
- Supported platforms
- The download page offers macOS builds for Apple Silicon and Intel, Windows builds, and a Linux download for Ubuntu.Read 29 Sep 2026 · masscode.io
- Sync
- There is no built-in cloud account or proprietary sync service; users can sync the vault folder with iCloud Drive, Dropbox, Google Drive, Syncthing, or Git.Read 29 Sep 2026 · masscode.io
- Sync options
- The vault can be synchronized with Git, iCloud, Dropbox, Google Drive or Syncthing because it is an ordinary folder.Read 14 Oct 2026 · masscode.io
- Syntax support
- The project states that it includes more than 160 syntax grammars and supports more than 600 through tmLanguage files.Read 14 Oct 2026 · github.com
- System requirements
- Official downloads list macOS 11 or newer for Apple Silicon, macOS 10.13 or newer for Intel, Windows 10/11 and Linux Ubuntu.Read 14 Oct 2026 · masscode.io
- VS Code extension
- The VS Code assistant can fetch, search, paste and create snippets through a massCode API endpoint.Read 14 Oct 2026 · marketplace.visualstudio.com
Plans and prices
Free Free No account required · local storage · macOS, Windows, Linux Read 14 Oct 2026 · masscode.io
Strong points and limits
Strong points
- Free and open source; no account required.
- Stores snippets and notes as editable Markdown files.
- HTTP space supports GraphQL and WebSocket.
- AI can connect to provider APIs or local models.
- Browser clipper supports Chrome, Firefox, and Safari.
Limits
- Vault files are plain text; maker advises against storing secrets there.
- No built-in cloud account or proprietary sync.
- Cloud AI API usage is billed by the provider.
Who it suits
massCode suits developers who want a local workspace for snippets, notes, and HTTP work. It may fit users comfortable managing their own vault backup or syncing through an external service.
Verdict
massCode combines snippet organization, Markdown notes, HTTP tooling, browser capture, and AI connections in a local-first workspace. Its plain-text vault and external-sync approach suit users who want file-level control, but secrets need separate care.
Where Specifiction places it
- Code Snippet Managers#4 of 338.8
- Code Snippet Management Software#3 of 228.7
