Yes. Turn off case sensitivity to treat A and a as the same line.
Remove Duplicate Lines
Clean repeated lines with case, trim, keep-first/keep-last, and preserve-order controls for fast text deduplication.
Runs entirely in your browser.
Input lines
0
Output lines
0
Removed
0
About this tool
Remove Duplicate Lines helps you clean repeated lines with case, trim, keep-first/keep-last, and preserve-order controls for fast text deduplication. It runs directly in your browser for speed and privacy with no sign-up required. Use the steps below to get results quickly, then copy or download the output and continue with related tools when needed. Try next: Text Sort Lines • Case Converter.
How to use
- Paste multiline text into the input box.
- Choose case and whitespace handling options.
- Pick keep-first or keep-last behavior and preserve-order preference.
- Review output counts, copy cleaned text, or clear to start over.
Related tools
Try next: Text Sort Lines • Case Converter • Word Counter.
Text Sort Lines
Sort multiline text A-Z or Z-A with numeric, case-sensitive, and empty-line controls for clean text ordering.
Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab-case.
Word Counter
Count words, characters, sentences, paragraphs, and lines instantly with privacy-first processing in your browser.
Online Notepad
Write, edit, and save notes in a clean browser-based notepad with local autosave, import/export, copy, and fullscreen controls.
Frequently asked questions
It keeps the most recent occurrence of each duplicate line.
Yes. Enable preserve order to keep natural input flow.
Yes. You can compare lines with or without trimming whitespace.