Upload
Upload the Excel workbook you want to protect.
Excel data privacy, made simple
Protect Excel data. Keep working. Restore with authorization.
Replace sensitive values with generated IDs while keeping the workbook useful for analysis, sharing, and day-to-day work.
Original data
Somchai PrasertBangkok Store
Nattapong K.Chiang Mai Store
Masked data
CU-00000001ST-00000001
CU-00000002ST-00000002
Same workbook structure, safer data
Before and after
See exactly what changes
Drag the control to compare the original workbook with a masked version. Only the selected sensitive values are replaced.
Before MaskingAfter Masking
The workbook structure stays intact while sensitive values become generated IDs.
01
Masking File
Protect sensitive columns before sharing or using the workbook outside its original context.
Select data
Choose individual columns or link related columns as a group.
Generate IDs
Create unique replacement IDs without exposing the original values.
Download
Receive a masked workbook that is ready for continued use.
02
Unmasking File
Restore original values only after the system verifies the workbook and the requester.
Upload masked file
Upload a workbook previously created by Masking Service.
Verify Job ID
Read the hidden job identity and locate the encrypted mappings.
Owner or OTP
Verify the owner directly or request team approval with OTP.
Restore workbook
Download restored.xlsx with the original values and headers.
03
Reversible, but controlled
Restoration is protected by ownership, team approval, and a complete audit trail.
Data owner
The owner can restore their own masked workbook directly.
Team OTP approval
A teammate needs the one-time code sent to the owner.
Audited activity
Successful and blocked restoration attempts are recorded.
Why Masking Service
Built for useful data and responsible access
The workflow stays simple for users while security controls remain active behind every restoration.
Reversible Masking
Restore original values when the requester is authorized.
Column & Group Masking
Protect single fields or related composite data together.
Controlled Unmasking
Owner checks and team OTP approval protect every restore.
Large Excel Ready
Streaming processing keeps large workbooks moving efficiently.
Encrypted Mapping
Original-to-generated mappings are encrypted for restoration.
Audit Tracking
Review successful, blocked, and approval-based activity.
Ready to protect your Excel data?
Start with your workbook and choose exactly which data needs protection.
