List splitter
Split a long list of lines into smaller lists by chunk size or count.
Related tools
List splitter
Paste a list with one item per line and this tool cuts it into smaller lists. Two ways to split: chunks of N items each — 1,000 email addresses become ten batches of 100 — or a fixed number of lists, divided as evenly as possible, so 10 items into 3 lists come out as 4, 3 and 3. Typical jobs: mailing batches that respect a send limit, splitting a backlog between teammates, breaking test data into fixtures, or turning one long export into pages of manageable size.
The distribution option decides which item lands where. In order keeps consecutive items together, which suits batches. Round-robin deals items like cards — first item to list one, second to list two and so on — which is the fair way to assign work or shuffle-free way to balance load across groups.
Between the lists you choose the separator: a plain blank line for the most copy-friendly output, or a numbered header. The header text is yours to edit, and every {n} in it is replaced by the part number — the default "— Part {n} —" produces — Part 1 —, — Part 2 — and so on; write "Batch {n} of 10" or anything else that fits your workflow.
Windows and Unix line endings are handled interchangeably and a trailing newline never becomes a phantom empty item. Everything runs locally in your browser — customer emails, usernames or order numbers never leave your device. The tally shows items and resulting lists live.