Sort & Dedupe Lines

Paste any list — a column of names, a log of IPs, the lines of a CSV, a stack of duplicates — and get it back sorted, deduplicated, or both. Sort A → Z, Z → A, by numeric value, by length, reversed, or shuffled. Locale-aware sort via Intl.Collator, Fisher–Yates shuffle, optional trim and skip-blank. Everything stays in this tab.

Input

—

Sort mode — sort alphabetically, ascending

Options

Case-insensitive — treat Apple and apple as equal Trim whitespace — strip leading/trailing spaces from each line Skip blank lines — drop empty or whitespace-only lines Remove duplicates — keep only the first occurrence of each value

Output

How sorting and dedupe work

Sort uses the browser's built-in Intl.Collator so accented characters (é, ñ) and non-Latin scripts (한, 字) sort in their natural order.
Numeric parses each line as a number; non-numeric lines sort after numbers, alphabetically.
Length sorts by character count; ties break alphabetically so the order is stable.
Shuffle is a Fisher–Yates permutation — every permutation is equally likely.
Dedupe compares each line to the ones before it; the first occurrence wins. Case and whitespace toggles affect what counts as "the same".
Stats in the input header show input → output line counts. The status line under the output flags duplicates removed and blanks skipped.
Nothing leaves the browser. The whole tool runs on a 5 KB script and the list you paste never gets uploaded.

About this tool

Sort Lines sorts a list of lines alphabetically, numerically, by length, or randomly. The numeric mode understands signed integers and decimals; the alphabetical mode is locale-aware and respects Unicode code-point order with case-insensitive comparison. You can also reverse the result, deduplicate, and remove empty lines. The tool runs entirely client-side on the text in the textarea, so sorting a 100k-line file is a one-keystroke operation.

When to use it

Sorting a list of usernames, emails, or IDs copied from a spreadsheet
Deduplicating a copy-pasted list before pasting it into a config file
Shuffling a list of names to randomise a seating chart or a turn order
Sorting lines by length to spot the longest entries in a log

When not to use it

You need to sort by a specific column (CSV, TSV) — use the CSV-specific tools on the site for that
You need a stable, multi-key sort — sort-lines is single-key only
You need to sort a binary file — paste only the lines, the tool is text-only

Frequently asked questions

Is the sort stable?

Yes. Lines that compare equal retain their original order in the output, matching the convention used by most sort implementations.

What does "numeric sort" do?

It treats each line as a number (the first numeric token found in the line) and sorts by that value, with non-numeric lines pushed to the end. Lines that start with `-` are sorted as negative numbers; lines that start with `0x` are parsed as hex.

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