By George Curta ·
Anonymize in Word, Excel & PowerPoint
Work where you already are. Our native Office add-in brings PII detection and anonymization directly into Microsoft Word, Excel, and PowerPoint.
Works in All Office Apps
One add-in for all your Microsoft Office applications. Full feature parity across Word, Excel, and PowerPoint.
Microsoft Word
Documents, contracts, reports
Microsoft Excel
Spreadsheets, data tables, CSV
Microsoft PowerPoint
Presentations, slides, notes
Key Benefits
Work In-Place
No copy-paste needed. Anonymize directly in your Office documents without switching apps.
Preserve Formatting
All formatting, styles, fonts, and document structure remain intact after anonymization.
Secure Processing
Your documents never leave your control. Processing happens securely via our encrypted API.
Zero-Knowledge Login
Your password never leaves your device. Our Zero-Knowledge authentication keeps you protected.
Learn about Zero-Knowledge SecurityCore Features
PII Detection
- Detect 273 entity types (names, emails, SSN, IBAN, credit cards, etc.)
- Hybrid detection: regex patterns + NLP for maximum accuracy
- Multi-language support (48 languages including RTL)
- Custom entity recognition with regex or deny lists
Anonymization Methods
- 5 anonymization methods: Replace, Mask, Redact, Hash (SHA-256), Encrypt (reversible)
- Reversible encryption with personal encryption keys
- Per-entity operator configuration (different methods per entity type)
- Consistent replacements across the entire document
Advanced Features
Preview Mode
Review detected entities before anonymizing. Side-by-side comparison shows original vs. anonymized text with confidence scores.
Presets
Save and reuse your anonymization settings. Create presets with specific entity types, methods, and operators for different workflows.
Reversible Encryption
Encrypt PII reversibly and decrypt later. Manage encryption keys securely with zero-knowledge architecture.
Per-Entity Operators
Configure different anonymization methods for each entity type. Hash names, encrypt emails, mask phone numbers—all in one pass.
Restore & Decrypt
Decrypt previously encrypted text or restore original values. Dedicated Restore tab for easy deanonymization.
48 Languages
Full multi-language support including Arabic, Hebrew, Chinese, Japanese, and Korean. RTL languages fully supported.
System Requirements
Compatible with all modern versions of Microsoft Office.
Supported Platforms
- • Microsoft Word 2016+ (Windows & Mac)
- • Microsoft Excel 2016+ (Windows & Mac)
- • Microsoft PowerPoint 2016+ (Windows & Mac)
- • Office Online (Word, Excel, PowerPoint)
- • Office for iPad/iPhone
What You Need
- • anonym.legal account (Basic plan or higher)
- • Internet connection for API access
- • Microsoft 365 subscription or standalone Office license
Frequently Asked Questions
Which Office applications does the add-in support?
Microsoft Word, Excel, and PowerPoint — all with full feature parity. Works on Windows and Mac (2016+), Office Online (Microsoft 365), and Office for iPad/iPhone.
Does the Office Add-in preserve document formatting?
Yes. The Preserve Formatting option maintains all formatting (bold, italic, underline, fonts, colors, styles) when anonymizing. Only the text content is replaced — document structure remains intact.
Can I use different anonymization methods for different entity types?
Yes. Per-entity operators let you configure different methods for each entity type in a single pass. For example: hash names (SHA-256), encrypt emails reversibly, mask phone numbers, and redact SSNs — all in one operation.
What is the Add-in Preview Mode?
Preview Mode shows a side-by-side comparison of original vs. anonymized text before applying changes. Each detected entity displays with its confidence score. You can select which entities to anonymize, change methods inline, and switch languages — all before committing changes.
Can I save and reuse anonymization settings?
Yes. Presets let you save configurations including language, entity types, per-entity operators, and score thresholds. Presets sync across devices via your account.
From the Blog
View all articlesLegal PII: Privilege Detection
Case reference numbers, bar admission numbers, court docket numbers, and client matter IDs are legally sensitive identifiers that standard PII tools miss.
PII Detection Cuts E-Discovery Costs
Attorney-led PII redaction in e-discovery costs $1-2 per page. A 50,000-document litigation matter generates $375,000+ in redaction costs alone.
FOIA: 80% Faster with Batch Redaction
US federal agencies received 1.5 million FOIA requests in FY2024 at an average cost of $482 per request. Batch PII redaction reduces processing time from.
Get Started with Office Add-in
Available from the Basic plan. Install in under a minute.
Limitations / Important note
- Compatibility depends on your Microsoft Office version and platform; some environments may not be supported.
- Detection is probabilistic; review before relying on results. This is not legal advice.