Zellio.io

Line Sorter & Deduplicator

Sort lines A–Z, remove duplicates, reverse, shuffle or trim a list.

Processed locally — nothing is uploaded

About Line Sorter & Deduplicator

Sorts alphabetically or by length, strips duplicates and blank lines, trims stray whitespace, and reverses or shuffles order, with case sensitivity as a toggle. The usual reason to reach for it is a list pasted out of a spreadsheet or a log.

Paste a list and this tool reorders it any way you need: alphabetically A→Z or Z→A, by line length, reversed, or randomly shuffled. In the same pass it can remove duplicate lines, drop empty lines and trim stray whitespace, with an optional case-insensitive mode so 'Apple' and 'apple' are treated as the same entry.

It is the fast way to clean a keyword list, tidy a CSV column, dedupe an email or URL list, or randomise names for a draw. Sorting uses natural ordering, so 'item2' comes before 'item10' rather than after it.

Learn how this works

Working With Text: Case, Diffs, Fonts & TranslationChange case, compare versions, generate fancy fonts, summarize and translate text — a guide to fast, private text tools.6 min readWhen a CSV Is Too Big for a SpreadsheetWhy spreadsheets fail on large files, what SQL and columnar formats do differently, and how to explore a big CSV without a database server.6 min read

Frequently asked questions

Are my lists sent to a server?

No. Everything runs locally in your browser using standard web APIs — your text, files and inputs are never uploaded to a server, so the tool works even offline once the page has loaded.

Does it sort numbers naturally?

Yes. Natural (numeric-aware) ordering is used, so 'file2' sorts before 'file10' rather than after it, which is how people expect lists to be ordered. This distinction matters for versioning, file lists, and sequential naming where standard alphabetic sorting would misorder items. Without natural sorting, 'item1' comes before 'item10' which comes before 'item2' — clearly wrong for most use cases. Natural ordering applies the mathematical meaning of numbers so numeric sequences sort correctly even when mixed with text, matching human expectations for logical list order.

Can I remove duplicates and sort at the same time?

Yes. Enable 'Remove duplicates' along with any sort mode; the tool deduplicates first (respecting the case-insensitive option) and then sorts what remains. This is useful for cleaning up mailing lists, removing duplicate tags or keywords, and tidying CSV exports where the same value may appear multiple times. Case-insensitive deduplication treats 'John', 'john', and 'JOHN' as the same entry, keeping only the first occurrence. The combination of deduplication and sorting in one pass saves time when cleaning large datasets.

More Line Sorter & Deduplicator tools

Remove Duplicate LinesAlphabetize a List Online

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