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Smart Toolsby FlowPilot AI

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Duplicate-line cleaner

Remove repeated entries from a pasted list. Simple, private, right in your browser.

Pick up where you left offMy workspace →

Save the inputs and settings you choose. Nothing is uploaded until you select Save.

Save a file to your 5 MB cloud space

Choose a file explicitly. Your tool’s open files are never uploaded automatically. PDF, PNG, JPEG, WebP, TXT, CSV and JSON are supported.

Preparing your workspace…

A LITTLE GUIDANCE

How to use this tool

  1. Paste one item per line.
  2. Choose trimming, blank-line removal and case sensitivity.
  3. Process to keep the first occurrence of each matching line.

A worked example

Input lines A, B, A → A, B, in that order, in exact-match mode.

What to know

Order is preserved. Trimming changes both comparison and output; turn it off when leading or trailing whitespace matters. Case-insensitive comparison uses English lowercase rules.

Supported inputs and limits

100,000 input characters.

Where is my data processed?

In your browser. Cloud saving is optional: only the supported inputs, settings or files you explicitly choose are uploaded. Download or save anything you want to keep before closing the page. Read our privacy details.

Further reading

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