DUL Data Utility Labs

CSV - Private browser tool

CSV Deduplicate

Remove duplicate rows from CSV locally in the browser and keep a clean export for spreadsheets or databases.

Use the tool Read FAQ 
id,name,team,active
1,Ada Lovelace,Data,true
2,Grace Hopper,Platform,false
2,Grace Hopper,Platform,false

CSV Deduplicate

Private, browser-based, free to use.

What this tool helps you do

Remove duplicate rows from CSV locally in the browser and keep a clean export for spreadsheets or databases. Paste your data, run the tool, copy the result, and move on. The core workflow stays on one focused page.

Best use cases

  • Convert or clean data before importing it into spreadsheets, BI tools, databases, or internal apps.
  • Debug API payloads, logs, tokens, encodings, regular expressions, and text transformations.
  • Create lightweight examples for documentation, tests, tutorials, customer support, and team handoffs.

Related tools

CSV CleanerCSV Column ExtractorCSV to JSON ConverterJSON to CSV ConverterCSV CleanerCSV Column Extractor

CSV Deduplicate FAQ

How are duplicates detected?

Rows are compared after trimming each cell.

Does it dedupe by one column?

This version dedupes complete rows. Column-based dedupe is a good Pro feature candidate.

Can I export the result?

Use the copy or download button after generating output.