Data Masker
BetaReplace real data with realistic fake data for testing and development
Drop your file here or click to browse
Supports CSV, XLSX, XLS
How Data Masking Works
Consistent Mapping
Same original value always maps to the same fake value, maintaining referential integrity across your dataset.
Format Preservation
Generated data follows proper formats — valid email structures, realistic phone numbers, properly formatted dates.
Statistical Similarity
Masked data maintains similar distributions and patterns, making it suitable for testing and analysis.
Perfect For
Test Environments
Populate staging and QA databases with realistic data that looks and behaves like production without privacy risks.
Developer Samples
Create sample datasets for documentation, demos, and onboarding new team members without exposing real customer data.
Third-Party Sharing
Share data with vendors, consultants, or partners for analysis while maintaining complete privacy compliance.
Supported Data Types
Emails
Realistic email addresses
Phone Numbers
Valid format numbers
Names
First, last, full names
Addresses
Streets, cities, zips
Companies
Business names
Dates
Birthdays, timestamps
Currency
Prices, salaries
Numbers
IDs, quantities
Frequently Asked Questions
Client-Side Processing Guarantee
Data masking happens entirely in your browser using JavaScript. Your files are processed locally and never transmitted anywhere. Verify this yourself by checking the Network tab in your browser's developer tools while using the tool.