Is my table data uploaded to a server?
No. The tool parses, transforms, previews, and exports data locally in your browser without uploading your input.
Data & Tables
Data Deduplicator
Remove duplicate rows from table data online. Compare full rows or selected columns locally in your browser.
Tool
Data Deduplicator
Remove duplicate rows from table data online. Compare full rows or selected columns locally in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this Data Deduplicator to find repeated rows in a table and choose which copy to keep. The tool compares full rows, selected key columns, trimmed text, case-insensitive values, or exact raw values. It previews duplicate groups before removal so users can avoid deleting records that only look similar.
Examples
- email,name,plan ada [at] example.com,Ada,Pro ben [at] example.com,Ben,Starter ada [at] example.com,Ada,Pro cy [at] example.com,Cy,Pro
Frequently Asked Questions
How are duplicates compared?
You can compare all columns or selected key columns, with options for trimming whitespace and matching case exactly or loosely.
Which duplicate row is kept?
The tool should make this explicit, such as keeping the first row, keeping the last row, or letting the user review duplicate groups.
Can removed rows be reviewed?
Yes. A useful implementation should show the removed rows before export so users can verify the cleanup.
What file sizes are practical in the browser?
Small and medium tables are the best fit. Very large files can use a lot of memory because parsing, previews, and exported results all live inside the browser tab.
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