File Line Sorter
Sort the lines of a text file alphabetically or numerically.
Lines in order
Sorting the lines of a file puts them in a defined order — alphabetical, numerical, or reversed — which makes data easier to read, scan and process. This sorts the lines of your text, in your browser, so the file stays on your device.
Load your text and choose how to sort the lines.
Why sorting helps, and the numeric trap
Sorting brings order to a list, which is useful for many reasons: making a long list scannable, grouping related entries together, preparing data for a process that expects sorted input, or simply tidying a file. One genuinely useful side effect is that sorting brings duplicate lines next to each other, making them easy to spot. There is a classic trap worth knowing, though: sorting numbers as if they were text gives the wrong order, because text sorting compares character by character, so 10 comes before 2 (since 1 comes before 2). This catches people out constantly. True numeric sorting treats the values as numbers and orders them correctly, which matters whenever a list is of numbers. Choosing the right sort — alphabetical for words, numeric for numbers — is the key to a sensible result. Doing it in the browser keeps even a sensitive file local while you reorder it.
Common questions
Why does sorting numbers sometimes give the wrong order?
Because sorting them as text compares character by character, so 10 comes before 2 — true numeric sorting treats them as numbers and orders them correctly.
What is sorting lines useful for?
Making a long list scannable, grouping related entries, preparing sorted input for a process, and bringing duplicate lines together to spot them.
Is my file uploaded?
No. The sorting happens in your browser, so the file stays on your device.