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CSV File Splitter

Split a CSV by row count, or into one file per value in a column.

  • Free
  • No signup
  • Nothing uploaded
  • No watermark

Drop a file here

CSV files · read on your device, never uploaded

How to Use the CSV File Splitter Online

CSV File Splitter: before and after CSV A BEFORE CSV FILESPLITTER CSV A AFTER

CSV File Splitter divides one CSV into many. Choose a row count to get equal-sized pieces for a system that caps rows per upload, or pick a column to get one file for each distinct value, for example one file per city or per sales rep. The header row is repeated at the top of every piece so each file works on its own, and all of them come back together in a zip.

Splits a CSV by row count or into one file per value in a column. The header row is repeated in every output file, since a CSV without headers is considerably harder for whoever receives it to use.

No software to install Free Works on any device

Step-by-Step Guide to Using the CSV File Splitter

  1. 1. Drop your file in, or click to choose one

  2. 2. Choose how to split it — by count, by size, or by a value in the file

  3. 3. Download the pieces one at a time, or all of them together as a ZIP

No .csv file to hand? Download a sample CSV file (635 B) and try it.

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What is the CSV File Splitter?

Splits a CSV by row count or into one file per value in a column. The header row is repeated in every output file, since a CSV without headers is considerably harder for whoever receives it to use.

CSV files

.CSV .TSV .TXT

Split a CSV by row count, or into one file per value in a column.

At a glance

  • Takes: One .csv, .tsv or .txt file
  • Split by: Number of rows, or one file per value in a chosen column
  • Header: Repeated in every output file; can be turned off
  • Gives: A zip of the pieces
  • Rows: Cut at record boundaries, never mid-row
  • Runs: Locally; the file is not uploaded

Why Inspect a Document Before Sending?

A file can look fine on screen and still fail a portal check because of its version, page size, fonts or hidden permissions. Inspecting it first shows those details plainly, and the helper tools split, merge and shrink data and office files.

“Check the file before someone else rejects it.”
  • Page count and size at a glance
  • Version and standard checks
  • Hidden attachments brought out
  • Data files split or merged
  • Fonts and links listed
  • Permissions shown before you share
  • Office files made smaller
  • Excel formulas explained

Popular Uses for Document Checkers

These checks answer the questions people have about a file before it goes anywhere.

  • Print shop checks Confirm page sizes, orientation and PDF/X before sending artwork to a printer.
  • Archive submissions Check whether a PDF meets PDF/A before submitting it to a court or registry.
  • Counting pages and words Find the page count and word count of a PDF for a quote or limit.
  • Checking links List every link inside a PDF to find broken or outdated addresses.
  • Font problems See which fonts a PDF uses and whether they are embedded for printing.
  • Shrinking Office files Make a heavy Word, Excel or PowerPoint file smaller before emailing it.
  • Splitting large CSVs Cut a huge CSV or JSON file into parts that other tools can open.
  • Excel formula help Check a formula for errors or turn a column number into its letter.

What You Can Do with the CSV File Splitter

Accepts CSV, TSV, TXT

Understands CSV structure rather than treating the file as bytes

Splits on record boundaries rather than byte counts, so no row or object is cut in half

Preserves the original encoding and line endings instead of normalising them silently

Why Use ToolXkit for CSV File Splitter?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Document Inspection for Different Users

Printers and publishers

Check PDF/X, page sizes and fonts before a job goes to press.

Legal professionals

Confirm PDF/A compliance, page counts and permissions before filing documents on a court portal.

Translators

Count words in a PDF to quote a fair price for a translation.

Data analysts

Split, merge and count rows in CSV and JSON files too big to open.

Office administrators

Check file sizes, versions and security settings before uploading to portals.

Web teams

Extract links and bookmarks from PDFs before publishing them on a website.

Best Times to Check a PDF or Data File

Inspection tools are worth a look when you are:

  • Sending artwork to a printer
  • Filing papers on a court portal
  • Quoting a translation job
  • Opening a CSV too big for Excel
  • Checking why a PDF was rejected
  • Sharing a file with restrictions
  • Emailing a heavy PowerPoint deck
  • Auditing links in a brochure

Tips and Good to Know

  1. Splitting by a column with thousands of distinct values, such as an ID, makes thousands of files. Pick a column with a handful of values.

  2. A size limit in megabytes is not a row limit. Divide the file size by the limit to pick a row count, then check one piece.

  3. To keep only some rows rather than split them all, CSV Row Filter is the better tool; to put pieces back, CSV File Merger.

Frequently Asked Questions

Answers to common questions about this tool.

Do I need to install anything to use the CSV File Splitter?

No. CSV File Splitter runs entirely in your browser — there is nothing to download, no extension and no desktop program. It works the same on Windows, macOS, Linux, Android and iPhone.

Is it safe to use the CSV File Splitter online?

Safer than the usual alternative, yes. Most online tools upload your file to a server you know nothing about, where it sits until someone deletes it. Here the file never leaves your device — the processing happens in the page itself, so there is no server copy to leak, retain or sell.

Does CSV File Splitter change my file?

The inspection tools only read the file and report what they find, so your document is untouched. Tools that split, merge or compress give you a new file and leave the original as it was.

What is PDF/A and do I need it?

PDF/A is a version of PDF made for keeping documents readable for many years. Some courts, government offices and archives ask for it. If a portal does not mention it, an ordinary PDF is fine.

Can I use CSV File Splitter without signing up?

Yes. No account, no email and no fee. Drop in the file and the report or result appears on the page, ready to read or download.

Why was my PDF rejected by a portal?

Common reasons are a file that is too large, the wrong PDF version, a password, missing fonts or pages of the wrong size. Checking those details here usually points to the cause.

Further reading

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