CSV Split

• CSV Merge
• CSV Sort
• CSV Viewer
• CSV Tools

Split a large CSV into multiple smaller files by row count. Use presets (100, 500, 1,000, 2,500, 5,000, 10,000) or a custom number. The first row is kept as header in each file. Set an optional filename prefix (e.g. export → export_1.csv, export_2.csv). After splitting you see a summary and row count per file; download each part. All processing is client-side—no upload to any server.

• Rows per file: presets or custom: Choose 100, 500, 1K, 2.5K, 5K, or 10K from the dropdown, or Custom and enter any number. Data is split into chunks of that size (the last chunk may be smaller).
• Header in each file: When the first row is treated as header, it is included at the top of every split file so each part can be used on its own.
• Custom filename prefix: Set a prefix (e.g. export, data). Output files are prefix_1.csv, prefix_2.csv, etc. Default is split.
• Summary and row count per file: After splitting you see total data rows, number of files, and rows per file (with last file noted if different). Each download button shows the file name and row count.
• Auto or custom delimiter: Choose Auto to detect the delimiter or pick comma, semicolon, tab, or pipe.
• Encoding for file upload: Select UTF-8, Windows-1252, or ISO-8859-1 when uploading a file.
• Client-side and private: Splitting happens in your browser; nothing is sent to a server.

Splitting large CSVs makes them easier to process in batches, import into systems with row limits, or share in smaller chunks. Presets help you pick common sizes quickly; a custom filename prefix keeps exports organized (e.g. report_1.csv, report_2.csv).

Powered by browser APIs and client-side processing.

• Rows per file: Preset (100–10,000) or Custom number. Last file may have fewer rows.
• File name prefix: Output files are prefix_1.csv, prefix_2.csv, … Default prefix is split.
• Header: First row is repeated at the top of every split file when present.