No. Sorting runs entirely in your browser — input and output never leave the device.

Is the sort case-sensitive?

No. We use `Intl.Collator({ sensitivity: 'base' })`, so 'Apple' and 'apple' are treated as equal in the ordering (but duplicates are not removed).

How are mixed alphanumerics like file1, file2, file10 sorted?

With `numeric: true`, they sort naturally as file1, file2, file10 — not the plain-string order file1, file10, file2. In descending mode you get file10, file2, file1.

What happens to empty lines and trailing newlines?

Empty lines are sorted as empty strings (they typically appear at the top in ascending mode, bottom in descending). The original trailing newline is preserved.

How is descending implemented?

Same collator comparison, with the result reversed. Equal-valued entries are not order-stable, but strictly distinct entries produce the exact reverse of the ascending output.

Back to Developer

Line sort — asc / desc / numeric / locale

Split the input by newline and sort the lines either ascending (A→Z) or descending (Z→A) using locale-aware Unicode comparison. Numeric runs (file1, file2, file10) sort naturally. Empty lines and the trailing newline are preserved. Works with mixed Japanese/ASCII text. Runs entirely in your browser.

developertext

How to use

Paste lines (one entry per line), pick a direction (ascending or descending), and click Run. Lines are split on \n / \r\n and reordered using `Intl.Collator` for locale-aware comparison. Numeric runs (e.g. file1, file2, file10) sort in natural order. Any trailing newline is preserved. Copy the result or download as .txt with one click.

FAQ

Is text uploaded?: No. Sorting runs entirely in your browser — input and output never leave the device.
Is the sort case-sensitive?: No. We use `Intl.Collator({ sensitivity: 'base' })`, so 'Apple' and 'apple' are treated as equal in the ordering (but duplicates are not removed).
How are mixed alphanumerics like file1, file2, file10 sorted?: With `numeric: true`, they sort naturally as file1, file2, file10 — not the plain-string order file1, file10, file2. In descending mode you get file10, file2, file1.
What happens to empty lines and trailing newlines?: Empty lines are sorted as empty strings (they typically appear at the top in ascending mode, bottom in descending). The original trailing newline is preserved.
How is descending implemented?: Same collator comparison, with the result reversed. Equal-valued entries are not order-stable, but strictly distinct entries produce the exact reverse of the ascending output.

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