Online Tool Store
CSV Splitter
Split a large CSV into smaller files by row count, with an optional repeated header, packaged into a single ZIP, in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
How the CSV splitter works
- Choose a CSV file and set how many rows each split file should contain.
- Choose whether to repeat the header row in every split file.
- Click Split CSV — the file is divided and packaged into a single ZIP, ready to download.
FAQ
Why would I need to split a CSV into smaller files?
Some tools and import systems have row limits, or a huge CSV is simply hard to open and work with — splitting a large export into manageable chunks makes it easier to review, share, or import piece by piece.
Should I repeat the header row in every file?
Usually yes — most tools that read CSV expect a header row to know what each column means, so each split file staying self-contained (with its own header) is generally more useful than headerless files.
Does the last file always have exactly the row count I chose?
No — every file except the last one has exactly your chosen row count; the last file gets whatever remains, which is usually fewer rows.
Is my CSV data uploaded anywhere?
No. The file is read, split, and packaged into a ZIP entirely in your browser — nothing is sent to Online Tool Store or any other server.
How we compare
| Feature | Online Tool Store | CSV Splitter (csvsplitter.io) | Splitting manually in a spreadsheet |
|---|---|---|---|
| One ZIP download for every part | ✓ | ✓ | Manual save-as per part |
| No file size limit or ads | ✓ | Free tier limits | ✓ |
| File never uploaded to a server | ✓ | Uploads to server | ✓ |
For splitting a large CSV into manageable parts without a size cap or manual copy-pasting, the Online Tool Store CSV Splitter does it right in your browser.