Mask PII in Excel Files
Find and hide personal data in an Excel file before you share it, such as emails, phone numbers and names. Free, in your browser.
How to use the Mask PII in Excel Files
Hide sensitive values before sharing data.
- Load your data
- Check the suggested methods
- Preview and download
Tips
- Personal data (email, phone, names…) is detected automatically.
- Consistent masking gives the same result for the same input.
- Add a salt to make hashed values harder to guess.
Example
Input: customers.xlsx
Output: customers_masked.xlsx
Frequently asked questions
How do I mask personal data in Excel?
Load the .xlsx file, review the detected columns and download the masked version.
Is my Excel file uploaded?
No. It is processed in your browser and never sent to a server.
Is masking the same as anonymizing?
Not always. Combined details can still identify people, so review before sharing.
Can a hash be reversed?
Not directly, but easy-to-guess values can be matched. Use a salt.
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