Schreibzeug

Schreibzeug is a self-hosted, open-source office suite: documents, spreadsheets, presentations and PDFs, edited together in real time in the browser or in a desktop app for Windows, macOS and Linux. It uses the Euro-Office engine (the open-source fork of ONLYOFFICE) without a document server, and it keeps your files as what they are: .docx, .xlsx, .pptx, .odt, .ods, .odp and .pdf, and Markdown notes and text files (.md, .txt).

A tour in pictures for customers and colleagues is the start page; the demo runs the editors in the browser with sample files, without a server (how).

Start here

Installation	run the server with Docker: settings, reverse proxy, backups, updates, troubleshooting
Accounts and sharing	sign-up, roles, sharing with accounts and by link
Sign-in through Kontext	OpenID Connect, Schreibzeug as Kontext's "Dokumente"
Desktop app	files on your computer without a server, or a window onto a server

Using it

Files and versions	folders, uploads, versions, trash, search (API and MCP) and the files API
Collaboration	several people in one file, through the server's relay
PDFs	forms, notes, signatures, OCR, pages, PDF/A
Markdown and text files	notes with a live preview, kept in their own encoding and line endings
E-invoices	ZUGFeRD and Factur-X: reading them, making them from an invoice
MCP server	Claude Code and other AI assistants in your files
Accessibility	WCAG 2.2 AA as the goal, the menu bar by keyboard, the engine's screen reader support (Strg+Alt+Z)

How it is built

Architecture	the workspaces, the web app, screenshots and format fidelity
The editing engine	how the interface drives sdkjs, feature by feature
Development	running it from source, checks, tests, releases