Split CSV Files Online



Free online CSV splitter - split CSV and keep the header

Convert directly in your browser, with no upload waiting time, and no risk of data leaks.

Simply choose your CSV file, pick a split method, and download the parts!

Choose a CSV File to Split

CSV File:
(Max 50M.)
(Big then 50M?)
or drag & drop the CSV file here
 
Split method:
 
Lines per file:
 





How to Split CSV (3 Steps)

  1. Choose your CSV file. Select a .csv file up to 50M.
  2. Pick a split method. Split by number of rows, by size or into a fixed number of parts.
  3. Download the parts. Each part contains the header row plus its share of the data.

Online vs App

Same job, two ways — pick the one that fits your file:

OnlineApp
Free✓Trial
No install✓—
No upload✓✓
Large files / batch✗✓
GUI✓✓
CLI—✓

In short: this page is best for a quick, small file. For large files or batch jobs, use the BigTextFileSplitter desktop app — it also ships a command line for scripts and scheduled runs.

What to Know About CSV

  • Every output file repeats the header row, so each part is a valid CSV.
  • The header is not counted as a data row when splitting by row count.
  • Rows are never cut in the middle of a quoted field.
  • The CSV is parsed in your browser and is not uploaded.

Frequently Asked Questions

Does each part keep the header?

Yes. The header row is copied into every part so each file can be opened on its own.

Can I split by a column value?

The online tool splits by row count, size or number of parts. Use the desktop Data File Splitter to group rows by column value.

How many parts will I get?

It depends on the method: split by rows gives files of that many rows, split by size targets a file size and split by number gives equal parts.

Related Tools

Split TSV file | Split text file | Merge CSV files | CSV to JSON | CSV to SQL | Offline CSV splitter

Need bigger files or batch conversion?

If this service cannot split your data correctly, or your file is big than 50M, you can split CSV file locally by this App: Big CSV File Splitter, for Windows, Linux, and macOS.

Want to stay in the browser? Subscribe (from $5/month) to raise the online limits.

If you have any question or suggestion, please contact us.