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Remove Duplicate Rows from CSV

Instantly remove duplicate rows from any CSV or spreadsheet. Keep your data clean and analysis-ready.

Pro feature — upgrade to use this tool

Pro feature

Upgrade to Pro to use the Remove Duplicates tool and process files up to 50 MB.

See Pro plans

What this tool does

Duplicate rows corrupt reports, distort metrics, and cause downstream errors. Tabular's duplicate removal scans every row in your file and eliminates exact matches, or lets you target specific columns — so you get the unique dataset you need without writing a single line of code.

Problems it solves

  • CRM exports with repeated customer records
  • Survey responses collected multiple times
  • Merged datasets with overlapping entries
  • Analytics exports with duplicated events
  • Inventory lists with identical SKUs

Example

One duplicate row removed, keeping the first occurrence.

Before

NameEmailPlan
Alicealice@example.comPro
Bobbob@example.comFree
Alicealice@example.comPro

After

NameEmailPlan
Alicealice@example.comPro
Bobbob@example.comFree

Frequently asked questions

Which row is kept when duplicates are found?

By default, the first occurrence is kept and subsequent duplicates are removed. The order of your original file is preserved.

Can I remove duplicates based on specific columns only?

Yes. Use the column selector to choose which columns define uniqueness. For example, you can deduplicate by email address only, ignoring other columns.

Does it work with XLSX files too?

Yes. Upload CSV or XLSX and download in either format. Tabular handles the conversion automatically.

What is the maximum file size?

Free users can process files up to 5 MB. Pro users get up to 50 MB, and Business users up to 100 MB.

Is my data kept private?

Yes. Files are encrypted in transit and at rest. They are automatically deleted after 24 hours. We never read or share your data.

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