Does the CSV leave my device?
No. Parsing, cleaning, mapping and downloads happen locally in this browser.
Private data preparation
Turn messy exports into import-ready CSV.
Clean duplicates and empty rows, map columns into a new system and neutralise spreadsheet formulas—without uploading company data.
Runs in this browserNo accountNothing uploadedNothing saved
01 / Source and target
Prepare the import
CSV or TSV, maximum 10 MB and 100,000 rows.
02 / Result
Ready to reviewYour cleaned import
Source rows0
Output rows0
Rows removed0
Cells protected0
Column mapping
Check where each target field comes from
Review notes
Always validate a sample import in the destination system. This tool does not write to your CRM, accounting platform or database.
Practical limits
Cleaning is safe. Importing still needs a check.
Will it guess complex transformations?
No. It suggests exact normalised header matches and keeps unmapped targets empty. Hidden AI guesses would make imports less trustworthy.
Why protect formulas?
Spreadsheet applications can execute cells beginning with formula characters. The default export neutralises them as text.