Is the output a real CSV?

It's tab-separated — easier to paste into Excel/Google Sheets which auto-detect tabs as cell delimiters.

Are items with count 1 included?

Yes — every unique value appears. Rows with count > 1 are highlighted yellow in the table view.

Count Duplicates in a List

Paste any list — one item per line — and get back each unique value with how many times it appeared, sorted by frequency.

Case-insensitive Trim values Ignore empty lines

Input list (one item per line) Results (TSV: value & count)

Table view

Load file

Unix (LF) Dos (CRLF)

How to use Count Duplicates in List

Paste a list, one item per line.
Toggle case-insensitive, trim, or ignore-empty as needed.
Click Count Duplicates and read the table.

What is Count Duplicates in List?

Find which items repeat the most in a list — surveys, vote tallies, log entries, name lists. Output is a TSV (value & count) that pastes cleanly into spreadsheets, plus a highlighted table view in the page.

FAQ

Is the output a real CSV?: It's tab-separated — easier to paste into Excel/Google Sheets which auto-detect tabs as cell delimiters.
Are items with count 1 included?: Yes — every unique value appears. Rows with count > 1 are highlighted yellow in the table view.

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