How to split a large email list into batch csvs
- Step 1Export your full email list as CSV — Download from your CRM, form tool, or ESP.
- Step 2Drop into CSV Row Splitter — Enter the batch row count — e.g. 10,000 rows per file.
- Step 3Download the batch files — Each file is numbered and includes the header row.
- Step 4Import each batch into your ESP — Upload batch-1.csv, batch-2.csv, and so on, at the cadence your ESP allows.
Frequently asked questions
Does each batch file include the header row?+
Yes. Every batch file starts with the same header row as the original.
What happens if the list does not divide evenly?+
The last batch contains the remaining rows, which will be fewer than the batch size.
Can I split into more than 2 batches on the free tier?+
Yes. The row splitter creates as many batches as needed from files up to 2 MB on Free. Pro removes the file size limit.
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