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massCode
What it is
massCode is a free, open-source desktop workspace for code snippets, Markdown notes, HTTP requests, calculations, and developer utilities. Its Code area organizes reusable snippets by project and language, with folders, search, and an editor. Notes can include task status and due dates, a connected graph, mindmaps, and presentation mode. The HTTP workspace supports collections, environments, scripts, tests, sequential runs, GraphQL, and WebSocket; it can also import requests from OpenAPI, Postman, or Bruno. A browser clipper saves selected code, page text, and links into Code, Notes, or HTTP. Snippets and notes live as plain Markdown files in a local vault, which users can read, edit, move, and back up outside the app. There is no built-in cloud account or proprietary sync, though external services can sync the vault folder. AI connections can use a provider API key or local models; cloud API usage is billed by the provider. Downloads are listed for macOS, Windows, and Ubuntu Linux, with browser builds for Chrome, Firefox, and Safari.
For and against
For
- Free and open source; no account required.
- Stores snippets and notes as local Markdown files.
- HTTP workspace supports GraphQL and WebSocket.
- Browser clipper saves code, page text, and links.
- Offers macOS, Windows, and Ubuntu Linux downloads.
Against
- No built-in cloud account or proprietary sync service.
- Vault files are plain text; maker advises against storing secrets there.
- Cloud AI API usage is billed by the provider.
- No team workspaces or version history.
The verdict
massCode combines code snippets, Markdown notes, and HTTP work in a local-first desktop app. Its plain-text vault and lack of built-in sync offer control, but users must handle syncing separately.
Who it suits
It suits developers who want snippets, notes, and HTTP tools in a local workspace. It may also fit users comfortable managing their own vault-folder sync and AI provider costs.
Plans and prices
Free
No account required · local storage · macOS, Windows, Linux
Read 14 Oct 2026 · masscode.io
On the record
- 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.masscode.io · read 29 Sep 2026
- AI providers
- The AI Assistant supports OpenAI, Anthropic, Gemini, DeepSeek, Mistral, xAI, OpenRouter, Ollama and LM Studio using user supplied credentials or local servers.masscode.io · read 14 Oct 2026
- Browser clipper
- The Clipper extension saves selected code to Code, readable text to Notes and pages or links as HTTP GET requests.masscode.io · read 14 Oct 2026
- Build requirements
- Building from source requires Node.js 20.16 or newer and pnpm 9 or newer.github.com · read 14 Oct 2026
- Code snippets
- The Code workspace organizes reusable snippets with folders, tags, fragments, search and syntax highlighting.github.com · read 14 Oct 2026
- Company ownership
- The project credits Anton Reshetov as copyright holder and maintainer.github.com · read 14 Oct 2026
- Developer tools
- Built-in tools include JSON comparison, encoders, decoders, generators, hash utilities and text converters.masscode.io · read 14 Oct 2026
- Drawings
- Drawings uses an Excalidraw-powered canvas with searchable diagrams, image export and Markdown embedding.masscode.io · read 14 Oct 2026
- Formatting and previews
- Code includes integrated Prettier formatting plus live HTML and CSS previews.github.com · read 14 Oct 2026
- HTTP client
- The HTTP workspace sends HTTP and GraphQL requests, exchanges WebSocket messages, stores history and supports collections, environments and folders.masscode.io · read 14 Oct 2026
- HTTP imports
- Collections can be imported from OpenAPI, Postman and Bruno.github.com · read 14 Oct 2026
- HTTP testing
- HTTP requests can use assertions, JavaScript tests, response extraction and sequential collection or folder runs.masscode.io · read 14 Oct 2026
- Imports
- The HTTP workspace can import requests from OpenAPI, Postman, or Bruno.masscode.io · read 29 Sep 2026
- Independent feature praise
- MacUpdate highlights multi-level folders, tags, more than 160 grammars, Prettier formatting, Markdown, Mermaid, full-text search and cloud-folder synchronization.masscode.macupdate.com · read 14 Oct 2026
- Integration API
- The local Integration API uses a configurable port, bearer token and generated token for extensions such as Clipper.masscode.io · read 14 Oct 2026
- Licence
- The application is released under the GNU Affero General Public License version 3.github.com · read 14 Oct 2026
- License and maker
- The project is AGPL v3 and its site credits Anton Reshetov, with copyright dating from 2019.masscode.io · read 29 Sep 2026
- Limit: depth versus specialists
- The independent review judged that the all-in-one approach sacrifices some depth, reliability and polish compared with dedicated tools.developers.pl · read 14 Oct 2026
