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Split CSV File

Split a large CSV into multiple smaller CSV files with the same header.

Accepted

CSV

Limit

1 file · up to 10 MB

Result

CSV → CSVs

Handling

Auto cleanup after 1h

Usage

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Max file size: 10MB

Max files per run: 1

Supported formats: CSV

Upload exactly one CSV file, up to 10MB. It will be split into several CSV files of up to around 5,000 rows each.

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Number of data rows per output file. Leave blank for the default (5000).

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Files are uploaded and processed in the background. You will see links and previews when the run is finished.

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Input summary

PDF compression summary

Original size

Compressed size

Reduced by

Pages

Success! Your PDF pages were converted successfully.

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Success! Your PDFs were merged successfully.

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Success! Your PDF was split successfully.

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Success! Your JPG images were combined into a PDF. Success! Your PDF is ready.

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CSV processing summary

Input rows

Output rows

Output files

Rows removed

Output size

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How it works

1

Upload the large CSV file

Select the CSV you want to split. Files with hundreds of thousands of rows are supported within your plan size limit.

2

Enter a row limit per output file

Set the maximum number of data rows each output file should contain. The header row is not counted toward this limit.

3

Files are split and named

The CSV is divided at the row boundary. The header row is copied into every output file. Files are named part-1.csv, part-2.csv, and so on.

4

Download the ZIP archive

All split files are packaged into a single ZIP for download. Extract and use each part independently for your import or processing task.

🔗 Related tools 4 related tools

Excel Viewer

Upload an Excel file to inspect workbook metadata such as sheet names and counts.

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Merge CSV Files

Merge multiple CSV files with the same columns into a single CSV.

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Clean CSV File

Clean a CSV by trimming spaces, removing empty rows, and optionally deduplicating rows.

Explore →

CSV to Excel (XLSX)

Convert a CSV file into a clean Excel (XLSX) spreadsheet.

Explore →

About Split CSV File

Many systems impose row limits on CSV imports: Salesforce data loader batches, email platform contact uploads, and some database tools reject files exceeding a set row count. Splitting a large CSV manually means counting rows carefully and copying the header into every output file by hand. This CSV Splitter accepts a maximum row count per output file, automatically copies the header into every part, and divides the data cleanly at the boundary. All split files are delivered in a ZIP archive with sequentially number...

→ Split a 50,000-row contacts export into 10,000-row chunks before a CRM bulk import. → Divide a large product catalog CSV into batches for a rate-limited bulk API upload endpoint. → Break a database export into smaller files so each can be opened in Excel without memory errors. → Split a large mailing list into equal segments before distributing to multiple campaign tools.

Related guides and workflows

Guide

Open Excel Files Online Without Excel

Open XLSX, XLS or CSV files online and inspect spreadsheet sheets, rows and cells in a read-only browser viewer without installing Excel.

Guide

How to Use Clean CSV File Online

Learn how to use Clean CSV File online. Clean a CSV by trimming spaces, removing empty rows, and optionally deduplicating rows.

Guide

How to Use CSV to Excel (XLSX) Online

Learn how to use CSV to Excel (XLSX) online. Convert a CSV file into a clean Excel (XLSX) spreadsheet.

📦 Supported formats 1 file types

CSV

❓ Frequently asked questions 4 answers

Yes. The header row from the original file is copied into the first row of every output part, so each file is independently importable without manual re-headering.

The last part contains the remaining rows, which will be fewer than the limit. All rows from the original file are preserved — none are dropped at the split boundary.

Free accounts support files up to 10 MB. Pro accounts raise this limit significantly. Processing time for very large files may be a few seconds longer.

Currently the tool splits by row count only, which is the most useful unit for systems that enforce import row limits. File size splitting is not yet available.