Download Offline PII Anonymizer
Access our platform from any device, anywhere
Get started in 3 steps
New here? Here's the fastest way to start anonymizing.
Choose how to run it
Open the web app for zero setup, or download the desktop app, Office Add-in, or browser extension below.
Install & sign in
Run the installer (or just open the web app) and log in with your cloak.business account.
Anonymize
Paste or upload your text — 317 entity types across 48 languages are detected and redacted automatically.
Web Application
Use directly in your browser
No installation required. Access all features directly from your web browser.
Desktop App
Native application for Windows, macOS, Linux
Download our desktop application for secure document processing with local file handling.
Mobile App
Coming SooniOS and Android applications
Anonymize text on the go with our mobile applications.
Office Add-in
Anonymize documents directly in Microsoft Word without leaving the application.
Developer & Browser Integrations
MCP Server
Integrate PII detection directly into AI coding assistants like Claude and Cursor via Model Context Protocol.
Chrome Extension
Automatically anonymize sensitive data before sending to ChatGPT, Claude, Gemini, and other AI assistants.
Nextcloud App
Anonymize files and text directly inside your self-hosted Nextcloud with the Cloak Anonymizer and Cloak Files apps.
Developer SDK
Official JavaScript and Python SDKs for integrating PII detection and anonymization into your own applications.
System Requirements
Web Application
- Modern web browser (Chrome, Firefox, Safari, Edge)
- JavaScript enabled
- Stable internet connection
Desktop Application
- Windows 10+, macOS 11+, or Linux
- 4GB RAM minimum
- 500MB free disk space
One Engine, Every Platform
Every platform variant of cloak.business runs the same enterprise-grade anonymization engine — 317 pattern recognizers, 48 languages, and seven anonymization operators. Whether you prefer a browser-based workflow, local desktop processing, or API integration, you get identical detection accuracy and the same zero-knowledge security architecture across all platforms.
Zero-Knowledge Security
Your encryption keys and passwords are derived client-side using Argon2id and never transmitted to our servers. Even we cannot decrypt data you protect with your client-side keys.
EU-Based Infrastructure
All servers are located in Germany. Data processing complies with GDPR, and no personal data is stored after processing. Your text stays private.
Offline-Capable Desktop
The desktop app (Windows, macOS, Linux) handles files locally — documents are never uploaded, only extracted text is sent to the API. Ideal for sensitive document workflows requiring local file control.
Seamless Integration
Connect to existing tools via the REST API, Office Add-in for Word/Excel/PowerPoint, Chrome Extension for AI assistants, or the MCP Server for AI coding workflows.