Break large CSV files into manageable chunks by row count or number of parts. Everything runs in your browser � your data never leaves your device.
Number of data rows in each split file
Split evenly into this many files
Split results will appear here
Select a part to preview...Three simple steps to split your CSV files.
Paste your CSV data directly or upload a file. The tool automatically detects the total number of rows and shows you the file stats.
Decide whether to split by row count (e.g., 100 rows per file) or by number of parts (e.g., split into 4 equal files). Toggle header inclusion.
Preview each split part individually, copy to clipboard, download individual files, or grab everything at once as a ZIP archive.
A CSV Splitter is a utility that divides a large CSV file into multiple smaller files. This is essential when you need to break up massive datasets into manageable chunks for processing, sharing, or uploading to systems with file size limits.
This tool supports two split modes: split by a fixed number of rows per file, or split into a specific number of equal parts. You can also choose whether to include the header row in each output file.
Meet upload limits
Many platforms have file size limits. Split large CSVs to fit within constraints.
Easier processing
Smaller files load faster and are easier to process in spreadsheets or databases.
Team collaboration
Split data into logical chunks for different team members or departments.
Batch processing
Process data in batches to stay within API rate limits or memory constraints.
Paste or upload your CSV file, choose your split method (by row count or number of parts), configure the settings, and click "Split CSV". Each part will be displayed in a tabbed interface for preview.
By Row Count: You specify how many rows go into each file (e.g., 100 rows per file). This is useful when you have a known limit.
By Number of Parts: You specify how many files to create (e.g., split into 4 files). The tool calculates the optimal row distribution automatically.
Yes! Click the "Download All" button to download a ZIP file containing all split parts. You can also download individual parts by selecting a tab and clicking "Download Part".
By default, yes � the "Include header in each part" option is enabled. This ensures each split file is a valid, standalone CSV. You can uncheck this option if you only want the header in the first part.
Absolutely. All processing happens entirely in your browser. Your data is never uploaded to any server. You can verify this by disconnecting from the internet and using the tool offline.
For a complete CSV workflow, explore our other free tools:
All processing happens in your browser. Your data never leaves your device.