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CSV Deduplicator

A powerful and free online tool to handle CSV Deduplicator operations instantly in your browser. Fast, secure, and fully local by OrbitInfra.

Original CSV
Unique CSV Data

Eliminating Duplicate Records from Customer and Sales CSV Files

Merging customer lists, combining multiple event exports, or scraping data often produces duplicate records. Sending duplicate emails or charging duplicate subscriptions damages business reputation and wastes resources.

The OrbitInfra CSV Deduplicator scans your dataset, identifies identical entries across the whole row or targeted key columns (such as Email or User ID), and outputs a pristine, unique dataset.

How to Use

  1. Upload your CSV file or paste tabular data into the editor.
  2. Select whether to deduplicate based on all columns or specific unique keys (e.g. Email).
  3. Click "Remove Duplicates" to analyze the records.
  4. Review the number of duplicates removed and download the deduplicated CSV.

Key Features & Capabilities

  • Deduplicates by entire row or specific unique identifier columns (e.g. Email, ID).
  • Displays exact metrics: original rows, duplicates removed, and final unique rows.
  • Option to keep either the first occurrence or the last occurrence of duplicate records.
  • 100% private in-browser deduplication.

Common Developer Workflows

  • Cleaning email marketing subscriber lists before uploading to Mailchimp or Klaviyo.
  • Consolidating multiple monthly sales exports into a single master ledger.
  • Removing redundant product catalog entries from combined vendor feeds.
  • Sanitizing CRM databases prior to enterprise platform migrations.

Frequently Asked Questions

Can I deduplicate based only on a specific column like Email?

Yes! You can choose a primary key column so that if an email appears multiple times, only the first record is kept.

Does deduplication preserve the order of my data?

Yes, the original order of the first-seen unique records is strictly maintained.

Is there a limit on how many rows I can deduplicate?

You can comfortably deduplicate tens of thousands of rows locally in your browser memory.