Remove duplicate lines from any text instantly. Keep only unique entries while preserving the original order — perfect for cleaning lists, database exports, email addresses, and log files. Free, private, no login.
Options
Follow these simple steps to deduplicate your text. It takes just seconds — no technical knowledge required.
Enter your text in the input box above, with one item per line. You can also click "Upload .txt file" to load text from a file on your device.
Select whether the comparison should be case-sensitive, whether to trim whitespace from each line, and whether to remove empty or blank lines from the result.
Press the button to process your text. Duplicate lines are removed instantly, keeping only unique entries in their original order.
Your deduplicated text appears in the Output box. Click "Copy" to copy it to your clipboard or "Download" to save it as a .txt file.
A fast, private, and reliable deduplication tool built by professional developers at CoderDesign Toronto. Here is what makes it different.
Remove thousands of duplicate lines in milliseconds. No waiting, no server uploads — everything runs instantly in your browser with zero latency.
Your text never leaves your device. All processing happens locally in your browser. No data is stored, sent to servers, or tracked in any way.
Use this tool on desktop, tablet, or mobile. Compatible with Chrome, Firefox, Safari, Edge, and all modern browsers — no installation needed.
Upload .txt files directly and process them instantly. Download your deduplicated output as a clean file when you are done.
Choose case-sensitive or case-insensitive matching, trim leading and trailing whitespace, and optionally strip empty lines for maximum flexibility.
Start using the tool immediately. No login, no account creation, no email required. Free forever — just paste your text and get results.
See how developers, marketers, and data analysts use the duplicate line remover to save hours of manual editing.
Remove repeated rows from database dumps or CSV exports.
Before
John Doe, Toronto Jane Smith, Vancouver John Doe, Toronto Mark Lee, Calgary
After
John Doe, Toronto Jane Smith, Vancouver Mark Lee, Calgary
Clean up email lists before sending campaigns.
Before
alice@example.com bob@example.com alice@example.com charlie@example.com
After
alice@example.com bob@example.com charlie@example.com
Clean up source code files by removing repeated import statements that accumulate during development and copy-pasting.
Before
import React from 'react'; import axios from 'axios'; import React from 'react'; import lodash from 'lodash';
After
import React from 'react'; import axios from 'axios'; import lodash from 'lodash';
Consolidate survey or form responses by removing repeated answers to get a clean list of unique entries.
Before
Very Satisfied Satisfied Very Satisfied Neutral
After
Very Satisfied Satisfied Neutral
Strip repeated log entries from server or application logs to focus on unique events and simplify debugging.
Before
[INFO] Server started on port 3000 [WARN] Disk usage 85% [INFO] Server started on port 3000 [ERROR] Connection timeout
After
[INFO] Server started on port 3000 [WARN] Disk usage 85% [ERROR] Connection timeout
Everything you need to know about removing duplicate lines from text. Can't find what you're looking for? Contact us.
Discover more free online tools built by CoderDesign — all instant, private, and no sign-up required.
Need a custom tool or web application? Let's discuss your project.