Line Sorter & Deduplicator

Written byOleh Soloninupdated 25 September 2026

Lines (one per line)

Order

Remove duplicates

Trim edge spaces

Result

Resultapple banana pear
Lines3
Duplicates removed1

Ordered, deduplicated, in one step

Sort lines alphabetically in either direction and remove repeats in the same pass. Handles numbers inside text sensibly.

Lists arrive messy: pasted from email, merged from two sources, edited by three people. Sorting them makes gaps and duplicates obvious immediately.

Sorting is natural rather than strictly alphabetical, so item2 comes before item10 instead of after it — the order a person would expect.

How to use

Paste the list, one item per line.
Choose ascending or descending order.
Switch on duplicate removal and edge trimming if you want them, then copy the result.

One list, both directions

The input was: item10, Apple, item2, apple, ' pear ', Banana, item1, a blank line, pear. With trimming and duplicate removal on, seven lines are left: the second pear went, Apple and apple both stayed.

Every row is output from this page's sorter.
#	Ascending	Descending
1	Apple	pear
2	apple	item10
3	Banana	item2
4	item1	item1
5	item2	Banana
6	item10	apple
7	pear	Apple

What this calculator shows

Your lines sorted ascending or descending
Duplicate entries removed, with a count of how many went
Optional trimming of stray spaces before comparison

What to keep in mind

Sorting ignores case, so Banana and banana end up next to each other.
Only identical lines count as duplicates: Apple and apple both stay.
Empty lines are dropped rather than sorted to the top.

FAQs

Does it sort Cyrillic correctly?

Yes. Comparison follows locale-aware rules, so Russian text sorts in proper alphabetical order rather than by character code.

Why does item2 come before item10?

Numeric-aware sorting reads the digits as a number. A plain character sort would put item10 first, since 1 precedes 2.

Are duplicates removed case-sensitively?

Yes. Apple and apple are different lines and both survive; sorting ignores case, though, so they end up side by side.

Is there a size limit?

Nothing enforced. Thousands of lines are fine; the browser will slow before the logic does.

What does edge trimming do?

It strips spaces at the start and end of each line, so ' pear ' and 'pear' become identical and the duplicate is caught.

Why is Banana ahead of item1 despite the capital letter?

Because case plays no part in the order: b comes before i, whatever the capitalisation.

Worked example

A list with a repeat

Input: банан, яблоко, груша, яблоко

Output: банан, груша, яблоко — one duplicate removed

Note: Sorting alone would leave the two identical entries adjacent; deduplication in the same pass is what actually cleans the list.

Useful links

All tools in Text tools for word count, character count, and quick cleanup

Line Sorter & Deduplicator

Result

Related tools

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Useful links