Split a Large CSV File
Break a Big CSV into Smaller Chunks
Need to use Split a Large CSV File right now?
Each resulting chunk keeps the original header row, so every piece is immediately valid and usable on its own.
2 file(s) generated
split-1.csv
name,age Alice,30 Bob,25
split-2.csv
name,age Carol,28 Dave,35
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
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About Split a Large CSV File
A large CSV file sometimes needs to be broken into smaller pieces — a system with a row-count import limit, distributing chunks of data across a team, or splitting one big export into manageable batches for testing. Doing this manually means counting rows and copy-pasting sections one at a time.
This tool takes CSV data and splits it into multiple smaller CSV files based on a row count you specify, with the original header row automatically repeated at the top of every chunk — so each resulting file is immediately valid and usable on its own, not just a headerless fragment.
Each chunk is shown individually with its own copy and download buttons, so you can grab exactly the pieces you need rather than downloading everything as one bundled archive. The row count you set applies to data rows only — the repeated header in each file doesn't count toward that limit.
How it works
- Paste your CSV data. Paste the full CSV content you want to split.
- Set rows per file. Choose how many data rows each resulting chunk should contain.
- Copy or download each chunk. Each split file includes the original header and is ready to use immediately.
Examples
4 rows split into chunks of 2
Input
name,age Alice,30 Bob,25 Carol,28 Dave,35 (rows per file: 2)
Output
split-1.csv (Alice, Bob) and split-2.csv (Carol, Dave), each with the header row.