7 Platforms

Anonymize Where Your Data Lives

No copy-paste between systems. Whether you work in browsers, offices, terminals, or AI agents — anonymize directly in your workflow. All 6 methods, all 48 languages, everywhere.

🌐

Web App

Anonymize in your browser. No installation needed.

Features:

  • Paste text; file upload (PDF, DOCX, TXT, CSV) from the Basic plan, all file types from Pro
  • Real-time entity detection and highlighting
  • Batch processing (CSV, JSON input) from the Basic plan
  • Preview before applying anonymization
  • Download results instantly
  • Free plan: 200 tokens every 30 days, text input (free account, no credit card)

Best for: Quick one-off anonymization, testing, ad-hoc document processing.

→ Open Web App
💻

Desktop App

Windows, macOS, Linux. Local file handling.

Features:

  • Tauri + Rust for blazing-fast performance
  • Desktop App: reads files on your device; detection runs on the EU-hosted API
  • BIP39 vault for encryption key management
  • Batch export with template variables
  • Watch folders for automated redaction
  • All 48 languages bundled (~50 MB)

Best for: Enterprises, sensitive data, regulated environments, mass document processing.

→ Learn More
📊

Office Add-in

Anonymize directly in Word, Excel, PowerPoint.

Features:

  • Sidepanel UI in all Microsoft Office apps
  • One-click anonymization on selections
  • Preview before applying changes
  • MDM (Mobile Device Management) deployable
  • Zero data leaves your tenant
  • Local file handling; detection via EU-hosted API

Best for: Finance, Legal, HR teams; HIPAA/GDPR-regulated organizations using Microsoft 365.

→ Deploy in Office
⚡

Chrome Extension

Detect and sanitize before sending to AI.

Features:

  • Manifest V3 + MV2 fallback compatibility
  • ChatGPT, Perplexity (full support); Claude, Gemini (partial)
  • Inline detection in any text field
  • One-click sanitize before sending
  • Optional cloud backup of encryption keys
  • Fully open-source on GitHub

Best for: Prompt engineers, data analysts, support reps interacting with AI systems.

→ Install Extension
🔌

REST API

JSON in, JSON out. Synchronous API.

Features:

  • Analyze, anonymize, deanonymize, batch, image
  • Bearer token authentication
  • Requires Basic or higher (API access)
  • Batch endpoint for large jobs
  • Usage tracking and token billing

Best for: Application developers, CI/CD pipelines, backend services, AI agents.

→ View API Docs
🤖

MCP Server

9 tools for AI agents. Claude, OpenAI, Anthropic.

Tools:

  • anonym_legal_analyze_text — detect PII in text
  • anonym_legal_anonymize_text — replace, mask, hash or encrypt PII
  • anonym_legal_detokenize_text — restore tokenized values
  • anonym_legal_redact_image — redact PII in PNG/JPEG images
  • anonym_legal_list_presets — list available presets
  • anonym_legal_estimate_cost — predict token cost
  • anonym_legal_get_balance, anonym_legal_list_sessions, anonym_legal_delete_session

Best for: AI developers building privacy-aware agents and autonomous systems.

→ Configure MCP
📝

LibreOffice Extension

Writer, Calc, Impress. Open-source office suite.

Features:

  • UNO extension (.oxt) format
  • Anonymize text, cells, or slide content
  • Same 6 methods as other platforms
  • All 48 languages supported
  • Zero data cloud storage
  • Open-source (GNU/LGPL)

Best for: Public sector, NGOs, open-source advocates using LibreOffice.

→ Download .oxt

Platform Feature Matrix

Feature Web Desktop Office Chrome Ext REST API MCP Server LibreOffice
All 6 Methods ✓ ✓ ✓ ✓ ✓ ✓ ✓
All 48 Languages ✓ ✓ ✓ ✓ ✓ ✓ ✓
Local File Handling ✗ ✓ ✓ ✓ N/A ✓ ✓
Batch Processing ✓ ✓ ✗ ✗ ✓ ✓ ✗
Key Management (Vault) ✗ ✓ BIP39 ✓ ✓ N/A ✓ ✗
Installation Required ✗ ✓ ✓ ✓ N/A ✓ ✓
Data Localization Cloud Local Local Local Cloud Local Local
MDM Deployable N/A ✓ ✓ ✓ N/A ✗ ✓

Choose Your Platform by Use Case

Quick One-Off Anonymization

Platform: Web App

Paste text, get results instantly. Free account, no installation. Perfect for testing or occasional use.

Sensitive Data Processing

Platforms: Desktop App or Office Add-in

Process locally without uploading to cloud. Offline mode. Encryption key vault. HIPAA/GDPR compliant.

Microsoft Office Integration

Platform: Office Add-in

Anonymize directly in Word, Excel, PowerPoint. No context switching. MDM deployable to entire organization.

AI Interaction (ChatGPT, Claude, Perplexity)

Platform: Chrome Extension

Detect PII before sending to AI. Inline sanitization. Works with ChatGPT, Perplexity, Claude, Gemini.

Application Development

Platform: REST API

JSON in/out. Synchronous API. Token-based billing. Rate limiting. Perfect for CI/CD pipelines and microservices.

AI Agents & LLMs

Platform: MCP Server

9 tools for Claude, OpenAI, Anthropic. Analyze, anonymize, detokenize, redact images. True AI integration.

Open-Source Office Suite

Platform: LibreOffice Extension

Writer, Calc, Impress. UNO extension format. Perfect for public sector, NGOs, FOSS communities.

Scale & Enterprise

Platform: Desktop App + REST API

Hybrid: Local processing for sensitive files, API for programmatic integration. Watch folders, batch exports, full automation.

Yes. The anonym.legal Chrome Extension automatically detects and anonymizes PII before it reaches ChatGPT, Claude, Gemini, Copilot, or any AI tool. Text is sent to anonym.legal's EU-hosted API (Hetzner, Falkenstein) for detection; only the sanitized text reaches the AI provider.

Data masking replaces sensitive values with realistic-looking substitutes (e.g., replacing a real name with a fake name). Data anonymization is broader — it includes masking, redaction, hashing, encryption, and custom methods. anonym.legal supports all 6 methods.

Yes. Upload PDF, Word, Excel, or text files for batch anonymization. The platform offers batch processing within your plan's limits. OCR support detects PII in scanned documents.

48 languages (42 with NER models, 6 with pattern-based recognizers only): 24 spaCy models, 7 Stanza models, and 11 Hugging Face models. Each language has region-specific entity detection (e.g., Steuer-ID for German, NIR for French, Codice Fiscale for Italian).

Yes. The REST API and MCP Server allow you to anonymize PII in your data pipeline with 3 lines of code. Synchronous API. Works with any HTTP client. Bearer token authentication.

The EU AI Act (full applicability August 2, 2026) requires GPAI providers to document training data handling. Anonymizing PII before AI training ensures Article 10 compliance. anonym.legal provides audit evidence for each anonymization.

See It In Action

Watch how anonym.legal detects and anonymizes PII in real time

Start With Any Platform

All platforms include all 6 methods and all 48 languages. Free tier: 200 tokens/month. No credit card required.

Open Web App

Also from anonym.legal

EU GDPR Compliance Hub → Legal Document Redaction → Enterprise DLP → Developer API & MCP →

Frequently Asked Questions

anonym.legal needs a connection to its EU-hosted API (Hetzner, Falkenstein) for detection, also in the Desktop App; it does not run in air-gapped networks.

Not directly, but the REST API and MCP Server can be integrated into Slack bots, Teams workflows, and any automation platform. The Chrome Extension works in any browser-based tool including Slack web and Teams web.

Web app for quick one-off tasks. Desktop app for offline/sensitive work. Office Add-in for Word documents. Chrome Extension for AI chatbots (ChatGPT, Claude). API/MCP for developer pipelines. LibreOffice for open-source workflows.