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Organize · browser workspace

Fuzzy Duplicate Finder

Flag similar text values for review. Process locally in your browser with HappyCSV.

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How to use this tool

Quick start

Built for flag similar text values for review.

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

Output: Limited to 2,000 rows and 128 characters per compared value. Similarity is a suggestion; rows are not deleted.

  1. 1Choose a supported file within the displayed limits.
  2. 2Review the supported format and configure the available options.
  3. 3Process locally, review the result, and download it.

How to Fuzzy Duplicate Finder

  1. 1Choose a supported file within the displayed limits.
  2. 2Review the supported format and configure the available options.
  3. 3Process locally, review the result, and download it.

Why Use This Tool?

  • ✓Flag similar text values for review.
  • ✓Limited to 2,000 rows and 128 characters per compared value. Similarity is a suggestion; rows are not deleted.
  • ✓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?

Limited to 2,000 rows and 128 characters per compared value. Similarity is a suggestion; rows are not deleted.

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?

Yes, up to 50 files and 500 MB combined, subject to the per-file and processing limits. Batch results download as a ZIP; errors identify any omitted files.