Remove Duplicate Lines from Text Online
Deduplicate text, keep unique lines, and clean datasets with case-insensitive and trim options — all client-side.
No uploads. Everything runs locally in your browser.
This tool removes duplicate lines online, preserving order by default. Enable sort A–Z to alphabetize after deduplication.
What is this tool
This remove-duplicate-lines tool deduplicates your text so only the first occurrence of each line remains. It helps you clean logs, CSV/Excel exports, and lists by cutting repeated lines, reducing noise, and preventing double counting.
Use cases
- Data cleaning for CSV/Excel lists and exports.
- Log analysis: remove duplicate log lines to focus on unique events.
- Coding: deduplicate dependency or config lists.
- Content prep: clean repeated lines before publishing.
Popular ways to use this tool
Pick a quick start. We’ll load an example so you can see duplicate removal instantly.
How to use
- Paste or type your multi-line text into the input box.
- Choose options: trim spaces, case-insensitive match, remove empty lines, or sort A–Z.
- View unique lines instantly, then copy or download the cleaned text.
Features
- Client-side duplicate line remover with case-insensitive and trim toggles
- Preserves original order by default with optional A–Z sort
- Live counts for total, unique, and removed lines
- Copy and download cleaned text instantly
- Optimized for large inputs with Set-based deduplication
FAQ
How do I remove duplicate lines from text?
Paste your text, enable trim/case options as needed, and the tool shows unique lines instantly. Copy or download when done.
Does this tool keep the original order?
Yes. By default it preserves input order; enable sort A–Z if you want alphabetical output.
Is the process secure?
All processing is client-side in your browser. No data is uploaded or stored.
Can I remove duplicates case-insensitive?
Yes. Toggle case-insensitive to treat lines like 'Apple' and 'apple' as duplicates.
Is this tool free?
Yes. It's free to use with no sign-up and no limits.