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Spreadsheet tool
Break a big CSV into smaller files by row count and download them as a ZIP.
Split CSV breaks a large CSV into smaller chunked files (with a ZIP download) so you can meet upload limits, parallelize imports, or share pieces with different teams. Chunking runs in the browser with a header row preserved on every part.
Many admin UIs and APIs cap rows or megabytes per upload. Splitting a 100k-row export into fixed-size pieces avoids failed imports without writing a custom script. Each chunk keeps the same header row so every file remains a valid CSV on its own.
Choose rows-per-file based on the destination’s documented limit, not only file size — wide tables hit size caps sooner. After splitting, spot-check the first and last chunks in CSV Viewer. Prefer UTF-8 sources so every part stays readable worldwide.
If you only need a filtered subset rather than equal chunks, use CSV Filter & Replace first, then split. For column-wise reduction, drop columns before splitting so each chunk is smaller and faster to upload.
Spreadsheet tools on ezToolFlow process CSV/Excel-style data in the browser when possible. Prefer UTF-8 CSV for best compatibility.
Drop the large file you need to divide. Confirm headers look correct in the preview.
Enter a positive chunk size (for example 5,000 rows). Headers are copied into each output part.
Receive multiple CSV parts packaged for easy download. Upload or share chunks as needed.
Feed SaaS bulk importers that reject oversized single files.
Hand different chunks to different people or jobs without double-counting headers.
Share large tables in smaller attachments when mail servers cap size.
Quick answers about tools, privacy, limits, and pricing.
About 20 MB is recommended so the browser stays responsive. Very large sheets may freeze on low-memory devices.
Yes. Each part is a standalone CSV with the same headers as the original.
Yes. Chunking is designed for browser-side processing so the master file need not be uploaded for the split itself.
That is expected. The final chunk contains the remainder after full-size parts.
This tool splits by row count. Filter to a subset first, or use multiple filtered exports if you need category-based files.
CSV compresses well but huge text still adds up. Drop unused columns or filter rows before splitting to shrink outputs.
No. Chunks follow the original row order from top to bottom.
Yes. Split CSV is free to use on ezToolFlow. Guests and free accounts may have daily limits on some tools; premium tiers can raise or remove those limits. AI tools may also spend credits.
For browser-based tools, processing runs on your device when possible and files are not uploaded for conversion. Optional accounts, usage limits, and AI features are described in our Privacy Policy.
No for most tools — you can start as a guest. An account helps keep higher daily limits and saved work (for example AI resumes).
Keep working with similar free tools — no signup required for most.
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