UtilityDock

Free browser-based CSV tool

CSV Split

Split large CSV files into smaller files in seconds. Everything stays in your browser.

Your CSV never leaves your computer.All processing happens locally inside your browser.

  • Split by rows, equal file count, or column value
  • Preview every generated file before downloading
  • Preserve encoding, headers, quoting, and line endings
1

Upload your CSV

Choose a UTF-8 or UTF-16 CSV. There is no upload to a server.

Drop a CSV file here

or use the file browser

Why split a CSV

Make large exports easier to import, review, and share

Large CSV files can exceed upload limits, time out during imports, or become unwieldy in spreadsheet software. Smaller files are easier to validate and process in controlled batches without changing the records themselves.

Common workflows

Prepare manageable batches for everyday systems

  • Keep CRM imports below per-file row limits
  • Divide order exports among operations teams
  • Create one regional file from a territory column
  • Process product catalogs in predictable batches
  • Separate client records by account or owner
  • Break archive exports into files that open faster

Large import limits

Choose a size the destination can handle reliably

Import limits vary by product and may count rows, bytes, or both. Check the destination’s current documentation, leave room for the header and long records, then use a conservative row limit. UtilityDock reports the planned row count for each file before creating the archive.

Examples

Three direct ways to divide a CSV

SourceSettingResult
10,000 rowsEvery 2,000 rows5 files of 2,000 rows
10 rows3 equal filesFiles with 4, 3, and 3 rows
Region columnSplit by RegionOne file for each exact region value

CSV Toolkit

Inspect, prepare, and clean CSV files locally

CSV FilterKeep rows that match one clear condition.CSV Column ReorderArrange columns while preserving every row.CSV Column RemoverRemove fields and download a focused copy.CSV Delimiter ConverterConvert comma, semicolon, tab, and pipe files.CSV Encoding & Delimiter DetectorInspect structure and import risks.CSV Column MapperRename and normalize headers.CSV Header Inspector & ValidatorCatch blank, duplicate, and risky headers.CSV Duplicate Finder & RemoverFind repeated rows and create a clean copy.
Browse the CSV Toolkit

FAQ

Questions about splitting CSV files

Does UtilityDock upload or store my CSV?

No. Your CSV never leaves your computer. Splitting, preview, and ZIP creation all happen locally inside your browser.

Which CSV split modes are supported?

You can split after every N data rows, distribute rows across a chosen number of equal files, or create one file per exact value in a selected column.

Does every output file include the header?

Yes. The original header is included in every generated CSV and does not count toward the configured data-row limit.

What happens when rows do not divide evenly?

When splitting into equal files, extra rows are assigned to the first files one at a time. No rows are dropped or duplicated.

Will encoding and CSV formatting be preserved?

Yes. UtilityDock preserves the detected encoding and BOM, delimiter, column order, quoted and escaped fields, source row formatting, and line endings.

How does split by column value work?

One file is created for each exact value, including a separate group for blank values. Capitalization and spaces remain meaningful, and row order is retained.