Split CSV into Equal Parts

Sometimes the goal isn't a specific row count per file, it's a specific number of files, four files to hand to four team members, ten files to distribute across ten worker processes, or any other scenario where the target is a piece count rather than a piece size.

Turbo CSV Splitter's Equal Parts method addresses this directly: it splits the file into exactly N roughly-equal files, running a quick row count first so the tool knows how many rows belong in each part, with the last file possibly a little smaller if the total doesn't divide perfectly evenly.

Choose this method when you want a specific number of pieces rather than a specific size or row count per piece, say, four files to hand to four people, or a set number of parallel chunks for a downstream process that expects a fixed number of inputs.

Because the tool runs a quick row count before dividing, each of the N output files ends up with a genuinely balanced share of the total data, rather than an arbitrary split that might leave one file much larger than the others.

The header is repeated on every equal part, keeping each file independently valid, and Preview shows your total row count before you commit, letting you confirm the division will work the way you expect.

Everything runs offline, on your own Windows PC, so dividing a file into equal parts never requires uploading any of your data to an external service. Delimiter and encoding both default to Auto and are detected directly from the file itself, so you only need to touch them in the rare case detection gets something wrong, an unusual delimiter or a legacy encoding, for example. This makes the tool equally useful for data analysts working with irregular exports, developers automating a recurring pipeline step, e-commerce teams distributing catalog data by category, and anyone else who regularly runs into the practical limits of opening a large CSV file directly in a spreadsheet program.

1. Install Turbo CSV Splitter on your Windows PC.
2. Browse to or drag and drop your CSV file.
3. Choose your output folder.
4. Select the Equal Parts (N Files) split method.
5. Enter the number of parts you want.
6. Run Preview to confirm the row count.
7. Click Start Split and monitor progress.
8. Open the output folder to find your equal parts.
9. Adjust the parallel worker slider (1-128) if compressing many output parts.
10. Check the status bar for the final row count and file count summary.

• Splits into a specific number of files rather than a specific size
• Runs a quick row count first for a genuinely balanced split
• Header repeated on every equal part
• Ideal for distributing work across a fixed number of recipients or processes
• Preview confirms total row count before committing
• Works on files of any size via streaming
• Runs fully offline with no uploads required
• One-time purchase for Windows, with Gumroad license activation
• Compression options: uncompressed, per-part ZIP/gzip, or a single bundled archive
• Works with files on local drives, external drives, and network shares