CSV Splitter

Split a CSV file into multiple smaller CSV files based on row count. Upload your file, choose rows per file, and download the split files instantly in your browser.

Upload a CSV file or drag and drop it here

Results

    Files are processed entirely in your browser and are never uploaded to any server.

    How it works

    How to split a CSV file online

    No accounts, no software to install, no files ever leaving your device. The entire process runs directly in your browser using the native File API.

    Upload your CSV

    Click to browse or drag and drop your CSV file into the upload area. Files stay on your device.

    Set your row count

    Enter how many data rows you want in each output file. The header row is automatically included in every part.

    Download your files

    Click Split File, then download each part individually — or download all parts as one ZIP file.

    Why use this tool

    Fast, private, and simple by design

    Most online CSV tools are cluttered with ads, require sign-ups, or quietly upload your data to a server. This one doesn't.

    100% Private

    Your data never leaves your browser. No uploads, no cloud storage, no logs.

    Instant Results

    Processing happens locally at full browser speed. Even large files split in seconds.

    Headers Preserved

    Every output file automatically includes the original column header row.

    Completely Free

    No account required. No file size limits enforced by a paywall. Just the tool.

    FAQ

    Frequently asked questions

    Upload your CSV, enter the number of rows per file, then click Split File. Each output file includes the header row plus its chunk of data. Download the parts from the results section.
    Yes. Splitting runs in your browser. No server uploads; each part is standard CSV and works in Excel, Google Sheets, and other tools.
    The first row is treated as the header and is copied to the top of every split file. Each part is usable on its own.
    Yes. Processing runs locally in your browser. Nothing is uploaded or stored.
    Yes, up to about 200 MB per file (browser memory permitting). Files over 50 MB may take longer to read and split. Everything runs locally with no server upload. Using more rows per part reduces the number of output files.
    Based on your filename: e.g. data.csv split into 3 parts becomes data-part-1.csv, data-part-2.csv, data-part-3.csv.