Full GRC control without cloud and database: Master the entire compliance lifecycle locally on your desktop - and save 50% costs thanks to AI support
A professional JSON editor with OSCAL integration for heterogeneous compliance
More than an editor
mjEdit is the first and currently the only open source GUI application that serves as a full-fledged and specialized GUI authoring environment for editing OSCAL JSON files. mjEdit is a professional and fully integrated work environment for daily work with information security management systems (ISMS) and designed for work in multi-governance, risk & compliance environments.
For ISMS editors this means: finally a tool that not only displays complex JSON structures transparently, but also makes daily documentation work easier with dynamic forms (qFORM).
Consultants benefit from the multi-tab interface, which allows them to simultaneously write policies in Markdown, review compliance documents, and work with annotations or redactions directly in the PDF viewer.
Examiners receive a central platform in which they can analyze JSON data, accompanying documentation and web content side by side in the integrated browser - without media breaks and without changing tools.
Core functions at a glance
JSON editor
Syntax highlighting, real-time validation, auto-repair, regex search, code folding - even for files over 1 MB.
qFORM forms
JSON arrays automatically as editable forms with text fields, checkboxes, dropdowns and Python QC scripts.
Markdown editor
Split view, GitHub Flavored Markdown, advanced task system with priorities, assignment and PDF/HTML export.
PDF viewer
Annotations (highlighter, notes, freehand), secure text redaction (redaction) and zoom up to 400%.
Browser tab
Chromium-based web browser with special bookmark management, tabs and lazy loading - directly in the application.
Plugin system
Expandable via hook-based plugins with tab registration and menu integration.
System requirements
No database required – all OSCAL data is stored natively as JSON. Runs completely offline.
OSCAL compliance – the unique selling point
- All 8 OSCAL document types (v1.2.2) fully supported - from catalog to mapping collection.
- KI integration with 154 MCP tools for AI-powered automation with Claude, Cursor, VS Code Copilot and AnythingLLM.
- Pydantic-based validation - Schema-compliant documents as they are created.
- BSI IT-Grundschutz++, BSI IT-Grundschutz, BSI criteria catalog C5 and NIST SP 800-53 catalogs are supplied.
- Network Discovery – IP addresses, hostnames and MAC addresses automatically into the SSP inventory.