Text Tools
Remove Duplicate Lines
Deduplicate lines while preserving order.
Runs locally in your browser — your input is not uploaded.
What is this tool?
Paste a list of emails, keywords, URLs, or log lines and this tool strips out the repeats, keeping only the first occurrence of each line. The original order is preserved, and it tells you how many duplicates were removed.
Deduplicating lines is useful for cleaning email lists, log excerpts, and tag dumps. ToolForge keeps the first occurrence of each line so original order is preserved.
How to use the Remove Duplicate Lines
- Paste your multiline text.
- Toggle case sensitivity or trimming if needed.
- Click Remove duplicates and copy the cleaned list.
Examples
Basic dedupe
apple banana apple
apple banana
Frequently asked questions
Are blank lines removed?
Blank lines are treated like any other line — the first blank line is kept, later ones are removed if identical.
Can it ignore differences in capitalization?
Yes. Turn off Case sensitive and lines like “Apple” and “apple” count as duplicates; the first version found is kept.
Is the output sorted?
No. Lines stay in their original order. Run the result through the Text Sorter if you also want it alphabetized.
Want more power later?
Premium tools, higher limits, and API access are on the roadmap. V1 stays free and private in your browser.