CSV Splitter — Split Large CSV Files into Smaller Parts

Split large CSV files into smaller chunks by row count or file size. Download each chunk individually.

Drag & drop your CSV here

or click to browse — max 500 MB

Excluding the header row. Each chunk will also include the header.

Frequently Asked Questions

Yes. Every output chunk automatically gets the original header row added at the top, so each chunk is a complete, independently valid CSV file that can be opened or imported on its own.

Common reasons: Excel has a 1,048,576 row limit; database import tools have file size limits; email attachments have size limits; large files are slow to open or process. Splitting creates manageable chunks.

For Excel: use 900,000 or fewer rows per chunk. For email attachments: aim for chunks under 10 MB each. For database imports: check your database tool documentation. A 1,000 row default works well for most uses.

Yes. Use the CSV Merger tool to combine the processed chunks back into a single file. Match by column position for best results when the structure is identical.

Download links for split chunks are valid for 60 minutes after processing. After that the temporary files are deleted automatically. Download all chunks before closing the page.

Related Tools

Your Privacy

Files uploaded for server processing are stored in a secure temporary location, processed immediately, and deleted automatically. We do not read, store, or share your data.