Line Sorter

🔤 Line Sorter – Sort Text Lines Instantly Online

The Line Sorter is a fast, browser-based tool that reorders multi-line text according to your chosen sorting rules. Whether you need to alphabetise a word list, numerically sort log entries, or order structured CSV rows by a specific column, this tool handles it in one click — no installation required.

Everything runs entirely in your browser. Your text never leaves your device. This free online line sorter is ideal for developers, data analysts, writers, and sysadmins who regularly work with lists and structured text.

📘 What Is Line Sorting?

Line sorting is the process of reordering lines of text based on a comparison rule. The input is split on newline boundaries, each line is compared against the others using the selected algorithm, and the lines are rearranged into ascending or descending order. Common use cases include sorting word lists for dictionaries, sorting file names, ordering configuration entries, and cleaning up exported data from spreadsheets or databases.

Standard lexicographic sorting works well for words, but can produce unexpected results for numbers — "10" sorts before "2" alphabetically. The Numeric and Natural modes solve this by treating embedded digits as integers rather than characters.

⚙️ How the Line Sorter Works

The tool processes your input in four stages:

1. Split — the input text is divided into individual lines at each newline character.
2. Normalise — depending on your settings, lines may be trimmed, deduplicated, or have empty lines removed before sorting begins.
3. Compare — each pair of lines is compared using the selected sort mode (Alphabetical, Numeric, or Natural). If Column Sort is enabled, only the value at the specified column position is used for the comparison.
4. Output — the sorted lines are joined back together and displayed in the output panel, optionally with line numbers prepended.

🔀 Three Sorting Modes Explained

Alphabetical — uses standard lexicographic (character code) comparison. Best for plain word lists, names, and labels where no embedded numbers are present.

Numeric — extracts the leading numeric value from each line and sorts by that number. The line "10 items" correctly comes after "2 items". Non-numeric lines are placed at the end.

Natural — splits each line into alternating text and number segments, comparing text segments lexicographically and number segments as integers. This is the most intuitive mode for file names, version strings, and any mixed alphanumeric data:

Input:   file1  file10  file2
Natural: file1  file2  file10

🏛️ Column-Based Sorting

For structured data (CSV, TSV, space-delimited), enable Column Sort to sort by a specific field rather than the entire line. Set the Delimiter to the character that separates fields (e.g. , for CSV or \t for TSV) and choose a 1-based Column Index. The sorting rule (Alphabetical, Numeric, or Natural) is then applied only to the extracted column value.

Input (sort by column 2, delimiter ","):
John,25
Alice,30
Bob,20

Output (Numeric Ascending):
Bob,20
John,25
Alice,30

🧮 Practical Examples

Example 1 — Alphabetical ascending (case-insensitive):

Input:   Cherry  apple  Banana
Output:  apple  Banana  Cherry

Example 2 — Numeric descending:

Input:   10  2  25  3
Output:  25  10  3  2

Example 3 — Natural ascending with duplicates removed:

Input:   img10  img2  img1  img2
Output:  img1  img2  img10

💡 Tips and Best Practices

• Use Natural sort for file names, software versions, and any list where numbers appear inside text strings — it produces the most human-readable order.
• Enable Trim Whitespace when pasting content from a spreadsheet or editor that may have added trailing spaces, to prevent those spaces from affecting sort order.
• Combine Remove Duplicates with sorting to clean and order a list in a single step — useful for generating unique sorted word lists or configuration keys.
• Use Line Numbers in the output when you need to reference a specific position in the sorted list without modifying the actual content before downloading.
• For very large inputs, prefer Download TXT over copying to the clipboard to avoid browser clipboard size limits.

🔗 Related Text Tools

Pair the Line Sorter with the Duplicate Line Remover for a dedicated deduplication workflow, or use the Character Counter to analyse the size of your lists before and after sorting. The Text Case Converter can normalise casing across all lines before you sort, ensuring consistent alphabetical ordering. For comparing two sorted lists side by side, the Text Similarity Checker provides a quick diff-style overview.