Your data stays on your device.
From import to download, every step happens locally in your browser.
ONE RECORD. ONE PLACE.
Keep the data.
Lose the repeats.
Remove duplicate CSV rows by one column or a combination of columns. Review what changed, then export a cleaner list.
01 Import02 Clean03 Export
Free trial · 3 files total · 500 rows eachDrop your CSVs here
One file or a matching batch. We’ll take it from here.
UTF-8 / UTF-8 with BOM · Up to 500 data rows per filePreview shows the first 50 rows. All values are treated as text.
A little structure goes a long way.
Import a file or take the sample for a spin.
Small details, kept intact.
SKUs stay text. Dates follow your format. You decide what changes.
Do it once. Save the recipe.
Turn your weekly cleanup into a few clicks with reusable rules.
A CLEANER WAY TO WORK
The right records. Just once.
Match contacts by email, products by SKU, or orders by a combination of fields. Exact matches keep the first occurrence. Combine with trimming when stray spaces are getting in the way.
- 01Bring your files. Import a CSV or a batch of matching exports.
- 02Set your rules. Choose what to trim, remove, rename, or combine.
- 03Check the difference. Review row and cell counts, then export.
A SMALL EXAMPLE
One SKU, one record
Select SKU as the duplicate key. With trimming enabled, two entries for 00124 become one record, while 00125 stays separate.
BEFORE 4 records
| SKU | Name | Date |
|---|---|---|
| 00124 | Canvas tote | 03/14/2026 |
| 00124 | Canvas tote | 03/14/2026 |
| (empty row) | ||
| 00125 | Desk tray | 03/15/2026 |
AFTER 2 records · 1 cell trimmed
| SKU | Name | Date |
|---|---|---|
| 00124 | Canvas tote | 03/14/2026 |
| 00125 | Desk tray | 03/15/2026 |
THE LITTLE DETAILS
Good questions.
Straight answers.
Need a quick answer before you start? Here’s how it works.
How do I remove duplicates from a CSV?+
Import your CSV, enable Remove duplicates, and select one or more key columns. Click Clean files to keep the first row for each unique key.
Can I deduplicate using multiple columns?+
Yes. Select every column that makes a record unique, such as email plus order ID. A row is removed only when the complete selected combination matches.
Are matches case-sensitive?+
Yes. Matches are exact and case-sensitive. Alex@example.com and alex@example.com remain separate. Trimming is a separate option applied before matching.
Which duplicate row is kept?+
The first occurrence in input order is kept. In merge mode, file order follows the import list, and duplicates can be removed across files.
Do blank duplicate keys match?+
Yes. Empty selected keys are exact matches too. Review your key columns before cleaning to avoid collapsing records with missing identifiers.
Is CSV export safe for spreadsheets?+
Cells and headers beginning with =, +, -, or @, including after whitespace, receive an apostrophe on export to prevent formula execution. This intentionally changes those exported values. Always review sensitive data before sharing.
LESS FUSS. BETTER FILES.