Remove Duplicate Lines
Delete repeated lines from a list while keeping the original order.
Text Tools Runs in your browser
How do you remove duplicate lines?
This tool removes duplicate lines from a list while keeping the first occurrence and the original order. NMSnabbit can optionally ignore case and trim spaces so near-identical lines are caught too. It runs entirely in your browser, making it a fast, private way to turn messy data into a unique list.
How to use the Remove Duplicate Lines
- 1 Paste your text or list, one entry per line.
- 2 Optionally enable “ignore case” or “trim lines” to catch near-duplicates.
- 3 Duplicate lines are removed instantly, keeping the first of each.
- 4 Copy the de-duplicated result.
What you can use it for
- Cleaning duplicate entries from email or keyword lists.
- De-duplicating log files or CSV columns.
- Removing repeated lines after merging documents.
- Building a unique list from messy data.
Frequently asked questions
Does it keep the original order?
Yes. The first occurrence of each line stays in place and later duplicates are removed, so the order you pasted is preserved.
Can it ignore case and spacing?
Yes. “Ignore case” treats “Apple” and “apple” as the same, and “trim lines” ignores leading and trailing spaces when comparing.
Is the data private?
Completely. Everything runs in your browser; nothing is uploaded.
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