Remove Duplicate Lines
FreeRemove duplicate lines from text and keep unique entries
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About Remove Duplicate Lines
Working with a list that has the same line repeated over and over is frustrating, especially when it's an email list, a set of keywords, or log entries you need to clean up. Manually scanning for repeats wastes time and you'll almost always miss a few. This tool finds every duplicate line and strips it out, leaving you with a clean set of unique entries.
Paste your list into ToolHub's Remove Duplicate Lines tool and it removes any line that appears more than once, keeping the first occurrence. It works right in your browser, free and without a signup. There's nothing to download, and your list never leaves your device, which matters when you're handling contact lists or private data.
Common uses
- Cleaning up email or subscriber lists before importing them
- De-duplicating keyword lists for SEO and ad campaigns
- Tidying exported data where the same row repeats
- Removing repeated entries from logs or scraped text
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Free browser-based tools
- Instant results
- No login required
FAQ
Which copy of a duplicate line is kept?
The first occurrence is kept and every later repeat of that exact line is removed.
Are blank lines treated as duplicates?
Repeated blank lines are collapsed like any other identical line, since they match each other exactly.
Is the matching case-sensitive?
Lines must match exactly, so a difference in capitalization or spacing counts as a different line.
Can I use Remove Duplicate Lines on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.