Split CSV File
Break a large CSV into equal chunks with headers
Runs 100% in your browser — nothing is ever uploaded.
What is Split CSV?
Paste a large CSV and split it into chunks of any size: pick the rows-per-chunk number and each part is emitted with the header row repeated, clearly separated and ready to copy. Useful for import tools with row limits, batch uploads and sharing samples of big datasets.
How to use Split CSV
- Paste your CSV into the input box or click “Load sample” to try it.
- Adjust the options in the toolbar if needed (root name, format, delimiter …).
- Click the convert button — the chunks output appears instantly in the output pane.
- Copy the result with one click or download it as a file.
ConvertLab FAQ
Is the CSV splitter free?
Yes — 100% free, no signup, no limits, no watermarks. Use it as often as you like.
Does each chunk keep the column headers?
Yes — the header row of the original file is repeated at the top of every chunk, so each part is a valid standalone CSV that any import tool can read without extra editing.
Is my data uploaded to a server?
No. Everything runs entirely in your browser with JavaScript — your data never leaves your device, which makes the tool safe even for confidential files.
Are these converters free?
Yes — every ConvertLab tool is 100% free with no signup, no limits and no ad walls.
Is my data uploaded anywhere?
No. All conversions (JSON, CSV, XML, YAML, INI, .env) run entirely in your browser. Nothing ever leaves your device.
Do these tools work offline?
Yes — once the page is loaded, every converter works without an internet connection.