Useful output, clear limits.
The tool keeps the first row for each selected value combination and creates a separate CSV copy. Empty values are treated as values when they are selected for comparison.
CSV / JSON · LOCALRemove duplicate rows from CSV
Remove duplicate rows from CSV
the first copy wins.
Choose the columns that define duplicate rows, review matching counts, and download a clean CSV copy locally in your browser.
Browser processingFile contents are processed here and not sent to File Maktab’s server; separate operational telemetry may be sent without file contents. Limit: 10 MB.
Drop a CSV file hereor choose a file from your device
Choose a file to begin.
File contents are processed in this browser workflow and are not sent to File Maktab’s server. Separate operational telemetry may be sent without file contents. The original file is unchanged.
FAQ
Before you download.
How do I remove duplicate rows from CSV?
Choose a CSV file, select comparison columns to deduplicate your dataset, review measured row counts, and download a clean CSV copy instantly.
Can I deduplicate CSV data by specific columns?
Yes. You can compare every column or select specific columns to remove duplicate CSV rows accurately.
Are CSV contents sent to File Maktab?
No. The selected CSV is parsed and processed in this browser workflow. Separate operational telemetry may be sent without file contents.
Does removing duplicates modify my original file?
No. The original file remains untouched on your device while a separate cleaned CSV is downloaded.