30 MB CSV sample

A CSV file of exactly 31,457,280 bytes. It is a valid Comma-separated values file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 30 MB sample, test or dummy CSV file.

sample-csv-30mb.csv

30 MB31,457,280 bytes

Download 30 MB CSV

Created in your browser in a few seconds, then checked against the SHA-256 checksum. No sign-up.

Type: text/csv
SHA-256: 7ca438927566af03a691661b16851934d6de5e93565c0d179d4ab2c2bc4596a4
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A header row and 230,928 rows of fictional customer records in 12 columns. The notes field of the last row is lengthened so the file lands on the exact byte count.

Data rows	230,928
Columns	12
Delimiter	Comma
Header row	Yes
Line endings	CRLF (RFC 4180)
Encoding	UTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-csv-30mb.csv, exactly as they appear in the file.

00000000  69 64 2c 66 69 72 73 74  5f 6e 61 6d 65 2c 6c 61 |id,first_name,la|
00000010  73 74 5f 6e 61 6d 65 2c  65 6d 61 69 6c 2c 70 68 |st_name,email,ph|
00000020  6f 6e 65 2c 63 69 74 79  2c 63 6f 75 6e 74 72 79 |one,city,country|
00000030  2c 73 69 67 6e 75 70 5f  64 61 74 65 2c 70 6c 61 |,signup_date,pla|

Preview

Creates the file in your browser and shows its first 64 KB.

Where 30 MB matters

A 31,457,280-byte file, 30 MB in the binary units that operating systems and upload limits use. It is useful wherever a form, an API gateway, a storage quota or a mail server is configured with a limit of about this size.

All 30 MB sample files

Use this file for

Testing email attachment limits
Testing data import features
Checking delimiter and encoding detection

Testing notes for CSV

Splitting each line on commas breaks on quoted fields. Test with the quoted-fields sample before trusting an importer.
Excel opens CSV files using the system locale, so a file that works in one country shows everything in one column in another.

CSV format reference

Technical details

File name	sample-csv-30mb.csv
Format	CSV (Comma-separated values)
Extension	.csv
MIME type	text/csv
Size	31,457,280 bytes (30 MB)
Kind	Text
SHA-256	7ca438927566af03a691661b16851934d6de5e93565c0d179d4ab2c2bc4596a4
Created	2026-10-23
Validation	See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility.
Preview	Available on this page
Source	Generated in your browser by this site's generator; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Spreadsheets

Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Verify your copy

This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.

sha256sum sample-csv-30mb.csv     # Linux
shasum -a 256 sample-csv-30mb.csv # macOS

On Windows, run Get-FileHash sample-csv-30mb.csv -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.

Related files

Questions about this file

Is this file exactly 30 MB?: Yes. It is 31,457,280 bytes, which is 30 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 30 MB CSV file?: A header row and 230,928 rows of fictional customer records in 12 columns. The notes field of the last row is lengthened so the file lands on the exact byte count.
Do the CSV samples have a header row?: Yes. The first line names the columns, and the sized samples use CRLF line endings as RFC 4180 describes.

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