Text & Writing
Free Sort Lines Tool Online
Sort lines of text alphabetically, by length, numerically, or in reverse order.
What is a line sorter?
A line sorter rearranges the lines of a text block according to a chosen sort criterion — alphabetically, by character length, or numerically. It is the browser-based equivalent of Unix commands like sort, sort -r, and sort -n, available instantly without a terminal.
Developers, data analysts, writers, and SEO professionals use line sorters daily to organize keyword lists, normalize configuration files, sort imports in code, prepare sorted CSVs, and arrange content hierarchically. Sorting is a foundational data operation — having it available as a fast, no-install web tool speeds up hundreds of small tasks.
This tool supports six sort modes, case-insensitive matching, optional duplicate removal, and blank line handling — covering the most common sorting workflows without requiring spreadsheet software or command-line access.
How to use the line sorter
- 1Choose a sort mode
Pick from A→Z, Z→A, Shortest first, Longest first, Numeric ascending, or Numeric descending. The right panel updates as soon as you select a mode.
- 2Set options
Enable Case-insensitive to treat "Apple" and "apple" as equal. Enable Remove duplicates to eliminate repeated lines after sorting. Enable Remove blank lines for compact output.
- 3Paste your text
Paste any multi-line text into the left panel. The sorted result appears instantly in the right panel with a line count.
- 4Copy the result
Click Copy on the output panel to grab the sorted lines ready for paste into your editor, spreadsheet, or terminal.
Sort modes compared
Each sort mode is designed for a different type of data. Here is a guide to which mode to use for common data types:
| Sort mode | Best for | Example input | Example output |
|---|---|---|---|
| A → Z | Names, keywords, tags, countries | banana, apple, cherry | apple, banana, cherry |
| Z → A | Reverse dictionaries, reverse keyword lists | apple, banana, cherry | cherry, banana, apple |
| Shortest first | Menu items, button labels, tag clouds | watermelon, fig, kiwi | fig, kiwi, watermelon |
| Longest first | Identifying verbose entries, longest URLs | watermelon, fig, kiwi | watermelon, kiwi, fig |
| Numeric ↑ | Rankings, scores, version numbers, IDs | 10 items, 2 items, 7 | 2 items, 7, 10 items |
| Numeric ↓ | Top-N lists, leaderboards, descending scores | 10, 2, 7 | 10, 7, 2 |
Alphabetical vs. numeric sorting: why it matters
A common mistake is using alphabetical sort on numbers, which produces counter-intuitive results. Alphabetical sort compares characters left-to-right, so "10" sorts before "2" because the character "1" has a lower ASCII value than "2". This is called lexicographic ordering.
Numeric sort extracts the leading number from each line and sorts by actual value, so "2" correctly comes before "10". The table below shows the difference:
Practical workflows for line sorting
Python style guides (PEP8, isort) require imports sorted alphabetically. Paste your import block, sort A→Z, and copy back — no need to install isort for a quick manual fix.
Some teams alphabetize CSS properties within each rule for consistency. Paste the property list, sort A→Z, and reorder. Pair with the case converter for consistent formatting.
SEO keyword research exports from Ahrefs or Semrush can have thousands of keywords. Sort alphabetically and enable Remove duplicates for a clean, deduplicated master list ready for content planning.
Reference tables, feature comparison lists, and changelogs are easier to read when sorted. Use this tool to quickly sort any tabular text data before pasting it into a document or spreadsheet.
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FAQ
Common questions
What sort modes are available?
The tool offers four sort modes: Alphabetical (A→Z), Reverse Alphabetical (Z→A), By Length (shortest to longest, with alphabetical tie-breaking), and Numeric (sorts lines that start with a number by their numeric value, not lexicographically). You can also reverse any mode to get descending order.
What is the difference between alphabetical and numeric sorting?
Alphabetical sorting compares characters from left to right, so "10" comes before "2" (because "1" < "2"). Numeric sorting extracts the leading number from each line and compares by value, so "2" comes before "10". Use numeric sort for version numbers, rankings, scores, and any list where numbers should sort by value.
Can I sort case-insensitively?
Yes. By default, uppercase letters sort before lowercase (A–Z before a–z). With case-insensitive sorting enabled, "banana" and "Banana" are treated identically, producing a more natural alphabetical order. The output preserves the original casing of each line.
Does the sort preserve blank lines?
By default blank lines are included in the sort (they sort to the top since empty strings sort before any character). Enable the Remove blank lines option to strip them before sorting for cleaner output.
Can I remove duplicates while sorting?
Yes. The Remove duplicates option deduplicates lines after sorting, keeping only the first occurrence of each line. For a fully clean sorted unique list, enable both Remove duplicates and Sort lines together.
Is this the same as the Unix sort command?
Alphabetical sort corresponds to `sort` (case-sensitive) or `sort -f` (case-insensitive). Numeric sort corresponds to `sort -n`. Reverse corresponds to the -r flag. The Remove duplicates option corresponds to `sort -u`. The primary difference is that this tool runs in your browser with no installation and works on any operating system.
How does length-based sorting work with ties?
When two lines have the same length, they are sorted alphabetically as a tiebreaker. This means length-sorted output is fully deterministic — the same input always produces the same output regardless of how the lines were ordered in the input.
Can I sort a list of numbers stored as text?
Yes, use Numeric sort mode. It extracts the leading number from each line (e.g., "42 apples" → 42, "7 bananas" → 7) and sorts by that value. Lines with no leading number are sorted to the end. This is useful for sorting numbered lists, version strings, and ranked exports.
What is the maximum number of lines this tool can sort?
The tool runs entirely in your browser using JavaScript's built-in array sort. It can handle hundreds of thousands of lines limited only by available browser memory. Sorting 100,000 lines typically completes in under 100 milliseconds.
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