Find Duplicate List Items

Find and extract duplicate entries from your list using the Find Duplicate List Items Tool. This tool detects lines that occur more than once and lists them once each. Includes live preview, count, trim/blank filters, file import/export, and copy support.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Trim whitespace from each line
Ignore empty lines

How to Use:

  1. Paste or import your list into the input box.
  2. Enable Options to trim lines or skip blanks.
  3. Tool displays each duplicate line once.
  4. Copy or export your results, or click Clear All to reset.

What Find Duplicate List Items Tool Can Do:

  • Shows lines that appear more than once
  • Outputs each duplicate only once
  • Trims and filters empty entries
  • Live preview with flash and output counter
  • Clipboard and file support

Example:

Input:

apple
banana
apple
cherry
banana
banana

Output:

apple
banana

Common Use Cases:

Perfect for filtering repeated data in logs, tags, or name lists. Helpful for cleanup, deduplication, and finding repeated input entries in any structured or unstructured text data.

Useful Tools & Suggestions:

If you’re spotting duplicates, Find Most Popular List Items helps show which ones are repeating the most it’s great for understanding trends or overused entries. And once you’ve identified the repeats, Remove List Item Bullets can help flatten and clean the list before further edits. It’s a solid combo when you’re scrubbing data, reviewing submissions, or organizing long sets of entries.