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Data Analysis · browser workspace

Extract Unique CSV Values

Choose a CSV column and create a sorted list of unique, non-empty values for filters and validation. Process locally in your browser with HappyCSV.

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How to use this tool

Quick start

Built for building a clean list of distinct ids, categories, regions, or filter values.

Everything runs in your browser, so you can test the workflow with sample data when available before using production files.

Output: A one-column CSV containing non-empty unique values.

  1. 1Upload the CSV.
  2. 2Choose the source column.
  3. 3Download the sorted unique-value CSV.

How to Extract Unique CSV Values

  1. 1Upload the CSV.
  2. 2Choose the source column.
  3. 3Download the sorted unique-value CSV.

Why Use This Tool?

  • ✓Choose a CSV column and create a sorted list of unique, non-empty values for filters and validation.
  • ✓A one-column CSV containing non-empty unique values.
  • ✓Files are processed locally in this browser.
  • ✓Keep the source file and review the result before importing it elsewhere.

Frequently Asked Questions

What does this tool support?

A one-column CSV containing non-empty unique values.

What are the processing limits?

Up to 100 MB per CSV, 20 MB per complex document; 250,000 rows, 1,000 columns, 2 million cells, and 128 MB output. Jobs stop after two minutes. Large files may need splitting.

Are my files uploaded?

No. File processing stays in your browser. Files are not automatically saved for the next visit.

Can I process multiple files?

This tool processes one file at a time.