Remove Duplicate Lines

Instantly remove duplicate lines from your text with this free online tool. Paste or import your data, and get a clean list with unique lines only. Export or copy results instantly. Works entirely in your browser fast, private, and accurate.

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 unique lines: 0
Total removed lines: 0
Options
Case-insensitive
Count duplicates
Sort output
Maximize output

How to Use:

  • Paste or type your text into the Input Text box.
  • Duplicates will be instantly removed and shown in the Output Without Duplicates box.
  • The Removed Duplicates box displays all lines that were filtered out.
  • Use the Choose File button to import .txt, .csv, or other supported text files.
  • Enable Maximize output to enlarge the Output section for easier viewing.
  • Use the toggles under Options:
    • Case-insensitive: Treat Apple and apple as the same line.
    • Ignore whitespace: Trim spaces from start and end before comparing lines.
    • Sort output: Alphabetically sort the final output.
  • Live preview updates as you type or toggle options.
  • Click Copy Output to copy results or Export to File to download as .txt.
  • Click Clear All to reset all boxes and counters.

What Remove Duplicate Lines Tool can do:

This tool scans your text and filters out all duplicate lines using customizable comparison rules. You can choose whether to ignore case, trim spaces, and sort the results. Each removed line is preserved in a dedicated output box so you know exactly what was filtered out. Whether you’re cleaning logs, code blocks, or data exports, the tool provides a fast, visual way to deduplicate content without needing Excel or scripts.

Remove Duplicate Lines Example:

Input Text:

apple
banana
Apple
banana
 grape 
Grape

With options: Case-insensitive ON, Ignore whitespace ON, Sort output ON, Output Without Duplicates:

apple
banana
grape

Removed Duplicates:

Apple
banana
 grape 
Grape

Common Use Cases:

Cleaning duplicate entries from lists or logs, tidying up CSV exports, filtering repeated lines in configuration files, and preparing clean datasets for import. Also helpful for text deduplication during coding or scripting workflows.

Useful Tools & Suggestions:

Once the duplicates are gone, Sort Text Lines can help bring order to what’s left especially if you’re scanning for patterns or preparing for export. And if the list feels dense afterward, Add Line Breaks to Text gives it some breathing room without changing the content.

Related Tools