Split a large CSV file into multiple smaller files by row count
or click to browse · Max 20MB
CSV splitting is the process of dividing a single large CSV file into multiple smaller files based on row count. Instead of struggling with one huge dataset, you get several manageable chunks that load faster, import without errors, and process more efficiently. The header row is preserved in every output file, so each chunk remains a valid, standalone CSV that any tool can read. CSV splitting is essential when working with large exports from databases, CRMs, e-commerce platforms, or analytics tools that produce files too large to handle in a single operation.
Common use cases: importing into Excel which has a 1,048,576 row limit, uploading contact lists to Mailchimp, HubSpot, or Salesforce that have batch limits, splitting product catalogs for staged imports, processing log files in parallel, sending large datasets via email by chunks, breaking down survey responses for separate analysis teams, and preparing data for incremental migration projects.
1. Click the upload area or drag your CSV file
2. View instant statistics — total rows, columns, file size
3. Set the number of rows you want per output file
4. Click "Split CSV" to start processing
5. Click "Download ZIP" to get all split files in a compressed archive
✅ 100% free — no signup, no watermark, no limits
✅ Header row preserved in every output file
✅ Live preview of rows and columns before splitting
✅ Works on Windows, Mac, Linux, Android, iOS — any browser
✅ Privacy-first — files auto-deleted after 1 hour
✅ Files up to 20MB
Upload your CSV file, set the number of rows per output file (default 100), and click Split. The tool divides your file into multiple smaller CSVs preserving the header row in each one, then packages them into a ZIP file for download.
Yes. The original CSV header is automatically duplicated at the top of every split file. This ensures each chunk is a valid standalone CSV that can be imported into databases, spreadsheets, or other tools without issues.
FileTools supports CSV files up to 20MB. Most CSVs with hundreds of thousands of rows fit within this limit. For larger files, consider splitting locally with command-line tools or programs like Excel before uploading.
Common reasons include: importing into systems with row limits like Excel (1M rows), Salesforce, or Mailchimp; sharing large datasets via email; processing data in parallel batches; reducing memory usage; or preparing data for incremental imports into databases.
Yes. Files are processed on our secure server and automatically deleted within 1 hour. We never store, share, or analyze your data. The splitter is also free and requires no signup.
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