SnapTools All tools
Remove Duplicate Lines
Remove duplicate lines from a list while preserving the order of first occurrence. Paste a list of lines (e.g. emails, IDs) and get a deduplicated list.
About this tool
When you have a list of items—emails, usernames, IDs, or any line-separated data—duplicates can cause errors or skew results. This tool keeps only the first occurrence of each line and removes the rest, so order is preserved and the list stays clean.
How to use
- Paste your list into the box (one item per line).
- Click Remove duplicates.
- Copy the result: only unique lines, in original order.
When to use this tool
- Deduplicating email lists or mailing recipients.
- Cleaning lists of IDs, usernames, or tags.
- Getting unique lines from logs or export files.
- Merging several lists without repeating the same line.
Tips
- Order is preserved: the first occurrence of each line is kept.
- Empty lines are treated as a value; if you want to remove them, use the Text Cleaner first or trim manually.
FAQ
- Are duplicates case-sensitive?
- Yes. 'Email@test.com' and 'email@test.com' are treated as two different lines. Normalize case first if you want them merged.
- What if lines have extra spaces?
- Spaces are part of the line. 'item' and ' item ' are different. Use Text Cleaner to normalize spaces first if needed.