# Remove All Duplicate Lines

Quickly delete all repeated lines from text

> Canonical page: https://elysiatools.com/en/tools/text-duplicate-lines-remover

- **Category:** Text Processing

- **Keywords:** text, duplicate, lines, remove, delete, repeated, unique, Text Duplicate Lines Remover

## Overview

Clean your data and organize your documents by instantly removing repeated lines from any text block. This utility helps you maintain unique datasets, simplify lists, and eliminate redundant information with precision and speed.

## Inputs

- **Text Input** (textarea): Enter text to remove duplicate lines from...
- **Duplicate Removal Type** (select)
- **Case Sensitive** (checkbox): Consider case when detecting duplicates
- **Preserve Original Order** (checkbox): Keep the original order of unique lines
- **Trim Whitespace** (checkbox): Remove leading/trailing whitespace from lines

## When to use

- Cleaning up messy email lists or contact databases.
- Preparing unique keyword lists for SEO or marketing campaigns.
- Removing redundant entries from log files or exported data reports.

## How it works

- Paste your text into the input area.
- Select your preferred removal method, such as exact matches or case-insensitive filtering.
- Toggle options like 'Preserve Original Order' or 'Trim Whitespace' to customize the output.
- Click the process button to generate your cleaned, unique list instantly.

## Use cases

- Consolidating multiple mailing lists into a single, clean master list.
- Filtering unique product IDs or SKU numbers from a raw inventory export.
- Cleaning up code snippets or configuration files by removing accidental duplicate entries.

## Frequently asked questions

### Can I keep the original order of my lines?

Yes, simply enable the 'Preserve Original Order' checkbox to ensure your unique lines remain in their initial sequence.

### Does the tool distinguish between uppercase and lowercase?

By default, the tool is case-sensitive, but you can select 'Case Insensitive' in the removal type settings to treat 'Text' and 'text' as the same.

### Will this remove empty lines?

You can choose to keep single empty lines or remove all duplicates, including empty ones, depending on your specific needs.

### Can I remove duplicates that have extra spaces?

Yes, use the 'Trim Whitespace' option or the 'Ignore Leading/Trailing Whitespace' removal type to clean up lines before comparison.

### Is there a limit to how much text I can process?

The tool is designed to handle large blocks of text efficiently, though extremely large files may perform better when processed in smaller chunks.

## Related tools

- [Empty Line Remover](https://elysiatools.com/en/tools/empty-line-remover): Remove all empty lines from text (lines with no content)
- [Line Number Remover](https://elysiatools.com/en/tools/line-number-remover): Remove line numbers from text or code with intelligent pattern recognition
- [Non-Alphanumeric Cleaner](https://elysiatools.com/en/tools/non-alphanumeric-cleaner): Remove all non-alphanumeric special characters from text with flexible preservation options
- [Prefix Remover](https://elysiatools.com/en/tools/prefix-remover): Remove common prefixes from each line with intelligent detection and customizable options
- [Suffix Remover](https://elysiatools.com/en/tools/suffix-remover): Remove common suffixes from each line with intelligent detection and customizable options
- [Text Duplicates Remover](https://elysiatools.com/en/tools/text-duplicates-remover): Remove duplicate lines, words, or characters from text
- [Text Emoji Remover](https://elysiatools.com/en/tools/text-emoji-remover): Remove emojis and special symbols from text content
- [Remove All Empty Lines](https://elysiatools.com/en/tools/text-empty-lines-remover): Quickly delete all blank lines from text

## Samples

- [Duplicate Line Samples](https://elysiatools.com/en/samples/text-duplicate-line-samples): Sample files with various types of duplicate lines for testing duplicate removal tools
- [Special Characters Samples](https://elysiatools.com/en/samples/text-special-characters-samples): Sample text files with various special characters, punctuation, and symbols for testing non-alphanumeric character removal
- [Android File Operations Java Samples](https://elysiatools.com/en/samples/android-file-operations-java): Android Java file operations examples including text file read/write, file copy/move, directory traversal, and file validation
- [Android File Operations Kotlin Samples](https://elysiatools.com/en/samples/android-file-operations-kotlin): Android Kotlin file operations examples including text file read/write, file copy/move, directory traversal, and file validation