Data Sanitizer: Clean CSV & Excel Data in Your Browser

DETECT

Bring in your data

Your data is processed locally in your browser and is not uploaded. Nothing changes until you approve it, and every original value is kept in the audit log.

Import CSV or XLSX

Paste a table instead

PREVIEW & APPROVE

Review suggested changes

Import data and choose “Detect suggested changes” to see what would change.

Row	Column	Original	Suggested (editable)	Rule	Decision

Possible duplicate rows

A duplicate row is only removed if you approve removing it.

Blank and placeholder cells

04 EXPORT

Take the cleaned data with you.

Only approved changes are applied. Spreadsheet-formula text in the CSV is prefixed with an apostrophe so it opens as text.