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Split CSV File

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

✓ Free to use
⚡ Queue-powered
🔒 Privacy-first

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.

Quick start

Start in under 10 seconds: choose file, process, download.

No signup required. Files are automatically cleaned up based on your plan retention settings.

Step 1

Upload

Drag files in or browse from your device.

Step 2

Process

Queue runs the conversion with smart defaults.

Step 3

Download

Get your output instantly when done.

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Average speed

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1
2
3

Step 1 — Upload a file

Drag a JPG, PNG, or WebP image onto the drop zone below, or click Browse. Drop a PDF onto the upload zone below to get started. Select a file or drag it onto the upload zone below.

Step 2 — Processing in the cloud

Your file is in the queue. This usually takes a few seconds — Pro users get priority processing.

Step 3 — Compare, download, or share

Drag the compare slider to see before/after. Use ← → keyboard arrows for precision. Download when ready. Your result is ready. Download the output or save it to your workspace.

Usage

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Max file size:

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Drag & drop your image here

or

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.

Smart file detection

✓ 1 image uploaded successfully

Ready to compress

✓ images uploaded successfully

Ready to compress

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

Saved tool settings

Save your current settings and apply them with one click.

Pipeline Builder

Build a multi-step flow (compress, convert, resize, merge) and run it in one upload.

Saved presets

Sign in to save and reuse pipeline presets.

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

Your files are ready. Download:

Download all (ZIP)
Polling slowed down or failed.

PDF workspace

Keyboard: Left/Right to change page, [ or ] to rotate the focused page, +/- to zoom, 0 to reset zoom.

Delete/restore, duplication, and page rotation apply to the reordered PDF output. Bulk rotate uses the marked target pages.

Pages

Focused page

Open full PDF
Rendering page…
Blank page

Input summary

Results

✓ Complete

Conversion Summary

Original size

Result size

Compression

Saved ratio:

Original
Optimized
Original
Optimized
Drag the handle to compare — or use ← → arrow keys. No optimized image yet — Click Compress image to generate the result Esc to exit fullscreen
💡

Tip:

Move the slider to compare the original and optimized images side-by-side. Look at the compression badge for quality metrics.

Original

Result

Saved

Reduction

Optimization Details

Original

Settings

Processing time

Download results

Choose an output format or download everything as a ZIP.

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Results

Result statistics

Original size

Result size

Saved

Saved ratio:

Original
Cropped
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Downloads

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We’re cropping your image.

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Read-only viewer results

Your file was analyzed without conversion. No output file was generated.

Read only

File size

MIME

Pages

Sheets

Image dimensions

Workbook tabs

Preview

Uploaded image preview

PDF preview

Open in new tab

Use browser PDF controls for zoom, search, and page navigation.

PDF compression summary

Original size

Compressed size

Reduced by

Success! Your PDFs are merged. Success! Your PDF is compressed. Success! Your PDF was split. Success! Your PDF is ready. Success! Your PDF is ready.

Download your output now or save it to your workspace.

Download merged PDF Download compressed PDF Download split files Download PDF Download edited PDF ⚡ Faster processing with Pro

CSV processing summary

Input rows

Output rows

Output files

Rows removed

Output size

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Smart next steps

Based on this run, here are two high-impact follow-up actions.

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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 fil...

→ 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

How to Use Excel Viewer Online

Learn how to use Excel Viewer online. Upload an Excel file to inspect workbook metadata such as sheet names and counts.

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.

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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.