Text File Splitter
Split a large text file into smaller parts.
Breaking a big file down
A text file too large to handle comfortably can be split into smaller, manageable pieces — by number of lines, by size, or into a set number of parts. This splits a text file for you, in your browser, so the file stays on your device.
Load a text file and choose how to split it.
When and why to split
Splitting a large text file solves several real problems. Some programs and systems have limits on the file size they will accept, so a file must be broken into pieces to be processed or uploaded. Very large files can be slow or impossible to open in ordinary editors, and splitting makes them workable. And distributing work — sending different portions of a dataset to different people or processes — needs the file divided cleanly. The key to a useful split is doing it at sensible boundaries, on whole lines rather than mid-line, so each piece remains valid and complete. Splitting by line count keeps records intact; splitting by size targets a file limit. Because it happens in your browser, even a large file full of sensitive data is divided locally without being uploaded, keeping the whole operation private on your own machine.
Common questions
Why split a text file?
To fit size limits some systems impose, to make a file too large to open workable, or to distribute portions of a dataset to different people or processes.
How should it split to stay valid?
At whole-line boundaries rather than mid-line, so each piece remains complete — by line count to keep records intact, or by size to hit a limit.
Is my file uploaded?
No. The splitting happens in your browser, so the file stays on your device.