Private CSV workbench
Merge CSV files and review duplicates.
Choose files, confirm their columns and keys, select what to keep, then take away cleaned and excluded-row CSV files. Everything stays in this browser.
Choose CSV files
UTF-8 CSV only, up to 20,000 rows and 100 columns per file. Source files are never changed.
Selected files
Choose CSV files.
Duplicate review (first 40 rows)
| File | Source row | Key | Group | Decision |
|---|
Take away the files
Check that input rows = cleaned rows + excluded rows before saving.
Input, filenames and results stay in temporary browser memory until an explicit save. No automatic deletion or entity matching is performed.
Supported scope
- Reordered columns are mapped to the first file's headers. Different headers stop safely.
- Compare one to three key columns and choose first, last or all duplicate rows to keep.
- Original cell text is preserved, with cleaned and excluded-row CSVs kept separate.
This does not perform customer matching or guarantee destination acceptance. Review the output and destination requirements.