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Remove Duplicates

Clean your email list by removing duplicate addresses. Paste your list and get a deduplicated, sorted result with stats.

Sign up for 25 free searches per month no credit card required.

One email per line, or separated by commas or semicolons

// how it works

How to Use Remove Duplicates

  1. 01

    Paste Your List

    Paste your email list into the text area. Supports one-per-line, comma-separated, or semicolon-separated entries.

  2. 02

    Deduplicate

    Click the button to instantly remove all duplicate entries and get a count of originals versus duplicates.

  3. 03

    Copy Clean List

    Copy the deduplicated and sorted list to your clipboard, ready to import into your email platform.

// features

Why Use Remove Duplicates

  • Case Insensitive

    Treats uppercase and lowercase as identical so John@Example.com and john@example.com are correctly merged.

  • Whitespace Handling

    Automatically trims leading and trailing spaces from each entry before comparing for duplicates.

  • Count Statistics

    Shows total entries, unique count, and number of duplicates removed so you can measure list quality.

  • Instant Processing

    Runs entirely in your browser with no server round-trip, delivering results in milliseconds even for large lists.

  • Bulk Support

    Handles lists of thousands of entries with ease, supporting newline, comma, and semicolon delimiters.

  • Privacy First

    Your email list never leaves your browser. No data is uploaded, stored, or shared with any third party.

// use cases

Who Uses Remove Duplicates

  • Email Marketers

    Clean subscriber lists before campaigns to avoid sending duplicate emails and inflating send counts.

  • Sales Ops Teams

    Merge prospect lists from multiple sources and remove overlapping contacts before CRM import.

  • Data Analysts

    Quickly deduplicate datasets exported from spreadsheets, databases, or CSV files for accurate reporting.

  • Event Organizers

    Consolidate RSVP and registration lists to get an accurate unique attendee count.

// faq

Frequently asked questions

Still have questions? Visit the help center

// quick start

Make your first call in a minute

Free account, real API key, the same endpoints Enterprise customers use.

  1. 1Create a free account25 searches a month. No card.
  2. 2Copy your key and secretFrom API keys in the dashboard.
  3. 3Call the APIPaste the request; the answer is JSON.
Get free API keyRead the docs
curl "https://api.tomba.io/v1/email-finder?domain=piedpiper.com&first_name=Richard&last_name=Hendricks" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY"
Response
200 OK· 1 search credit
{
  "data": {
    "email": "richard@piedpiper.com",
    "first_name": "Richard",
    "last_name": "Hendricks",
    "full_name": "Richard Hendricks",
    "website_url": "piedpiper.com",
    "company": "Pied Piper",
    "pattern": "{first}",
    "department": "executive",
    "type": "personal",
    "position": "CEO",
    "country": "US",
    "gender": "male",
    "twitter": null,
    "linkedin": "https://www.linkedin.com/in/richard-hendricks",
    "score": 100,
    "accept_all": false,
    "phone_number": true,
    "verification": {
      "date": "2025-01-15T10:32:00+01:00",
      "status": "valid"
    },
    "sources": [
      {
        "uri": "https://piedpiper.com/blog/engineering",
        "website_url": "piedpiper.com",
        "extracted_on": "2024-06-01T09:14:07+01:00",
        "last_seen_on": "2025-01-10T17:02:44+01:00",
        "still_on_page": true
      }
    ],
    "phone_data": []
  }
}