Table Data Masking
Replace selected columns with masked values or local identifiers before sharing a copy.
Comma, semicolon or tab separated, or upload a CSV or XLSX file. The first row holds the column names.
Stars keep the last characters (and an email's domain). Stable codes swap each value for a code such as name-1, so the same person keeps the same code. Empty cells remove the value.
Your result
Paste or upload a table, then pick the columns to hide.
How to use it
- Paste or upload the table.
- Tick the columns and choose how to hide them.
- Check the preview and download the CSV.
Examples
- Emailada@example.com a**@example.com
- Phone0501234567 *******567
- Stable codeAda on two rows name-1 on both rows
Tool details and privacy
Hide sensitive columns in a table before you share it: stars, a stable code per value, or empty cells.
Share a table for analysis or support without exposing names and phones.
Options
- Columns that look personal are ticked for you; change them as you need.
Limits
- Stars keep part of the value; pick empty cells to remove it fully.
- Stable codes are not encryption.
Privacy
What you type or open stays in your browser. Nothing is uploaded or saved on the server.
Questions
Can the values be recovered?
Not from the output file.
Why stable codes?
The same person keeps the same code, so counts still work.
Does it read XLSX?
Yes.
Is the table uploaded?
No.