🍋 Text Tools
Remove Duplicate Lines
Remove duplicate lines from text.
chars
words
sentences
lines
Options
Results
Result
About Remove Duplicate Lines
Remove duplicate lines from a list while preserving the original order. Configure case sensitivity, whitespace trimming, and blank line removal.
How It Works
The tool tracks each unique line using a hash set. When a line has been seen before, it is removed from the output. Comparison can be case-sensitive or case-insensitive, and leading/trailing whitespace can be trimmed.
Step by Step
- 1 Paste your list with duplicate lines
- 2 Choose comparison options (case sensitivity, trimming)
- 3 Click Remove Duplicates
- 4 Copy the deduplicated result
Tips
- Enable 'Trim whitespace' to catch lines that differ only by spaces.
- Original order is always preserved — the first occurrence is kept.
Frequently Asked Questions
Which duplicate is kept?
The first occurrence of each line is always kept. Subsequent duplicates are removed.