Remove Duplicate Lines
Paste a list and strip out repeated lines instantly. Optionally ignore case, trim surrounding spaces, and sort the cleaned list alphabetically.
Cleaning duplicates from a list
Duplicate lines creep into email lists, keyword sets, CSV columns, and log files. Removing them by hand is error-prone; this tool strips repeats instantly while keeping the first occurrence of each line.
Options let you ignore case (so 'Apple' and 'apple' count as one), trim surrounding whitespace, and sort the cleaned result. Everything is processed in your browser, so your data stays private.
How to use Remove Duplicate Lines
- 1Paste your list, one item per line.
- 2Toggle the options you want — ignore case, trim, or sort.
- 3The de-duplicated result updates live.
- 4Copy the cleaned list with one click.
Frequently asked questions
Is my list uploaded anywhere?
No. Everything is processed in your browser, so your data stays private.
Does it keep the original order?
Yes, unless you enable Sort. Without sorting, the first occurrence of each line is kept in place.
Can it ignore capitalisation?
Yes — enable 'Ignore case' to treat 'Apple' and 'apple' as the same line.