Split CSV File
Break a large CSV into smaller files. Split every few hundred or thousand rows so each piece fits an import limit, or split into one file per value in a column so each category lands in its own file. The header is repeated in every part.
Read the guide: How to Split a CSV FileEverything runs on your device. Files never leave your browser.
How it works
- 1
Add a CSV file
Drop in a .csv file, or paste CSV text directly.
- 2
Choose how to split
Split by a row count for evenly sized pieces, or by a column so each distinct value gets its own file.
- 3
Download the parts
Get each piece as its own CSV, with the header row carried into every file.
Instant & 100% private — nothing is uploaded
Everything runs locally in your browser. Your files are processed on your own device and are never sent to a server, so there are no upload waits, no size limits from us, and nothing is ever stored or logged.
Frequently asked questions
- Does each split file keep the header row?
- Yes. When your first row holds column names, that header is copied into the top of every part, so each file is complete and ready to import on its own rather than leaving later pieces headerless.
- What does splitting by a column do?
- It groups rows by the value in the column you pick and writes one file per distinct value. A sales export split on a Region column becomes one file per region, which is handy for sending each team only its own rows.
- Why split a CSV at all?
- Many import tools, email attachments and upload forms cap the number of rows or the file size they accept. Splitting lets a large export go in as several smaller files, and splitting by a column lets you hand each group exactly the slice it needs.
- Is my file sent to a server?
- No. Everything runs locally in your browser. Your file is read and processed on your own device, nothing is uploaded, and nothing is logged or stored.
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