Split Huge Text File to Smaller Files

Click "New Task" at "Start".

Split Huge Text File to Smaller Files - new task

then show the splitting form, choose the file to split.

Split Huge Text File to Smaller Files - split huge file

For repeatable task, you can click "Save Session" button to save config, then run it next time. see also: Save and load session.

If you want to split JSON file at object level rather than just lines, try Data File Splitter.