3 MB CSV sample
A CSV file of exactly 3,145,728 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 3 MB sample, test or dummy CSV file.
Download
sample-csv-3mb.csv
3 MB3,145,728 bytes
Download 3 MB CSVCreated in your browser in a few seconds, then checked against the SHA-256 checksum. No sign-up.
- Type
- text/csv
- SHA-256
c55826b480c66ca4968d0cc11828361c4069002280190b55c811e9a3bac76e78- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
A header row and 23,426 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 | 23,426 |
|---|---|
| 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-3mb.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 3 MB matters
A 3,145,728-byte file, 3 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.
Use this file for
- Finding out whether a 1 MB default has been raised
- Checking delimiter and encoding detection
- Load-testing with many rows
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.
Technical details
| File name | sample-csv-3mb.csv |
|---|---|
| Format | CSV (Comma-separated values) |
| Extension | .csv |
| MIME type | text/csv |
| Size | 3,145,728 bytes (3 MB) |
| Kind | Text |
| SHA-256 | c55826b480c66ca4968d0cc11828361c4069002280190b55c811e9a3bac76e78 |
| 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-3mb.csv # Linux
shasum -a 256 sample-csv-3mb.csv # macOSOn Windows, run Get-FileHash sample-csv-3mb.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 3 MB?
- Yes. It is 3,145,728 bytes, which is 3 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 3 MB CSV file?
- A header row and 23,426 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.
- Is the data real?
- No. Names are invented, email addresses use the reserved example.com domains and phone numbers use the fictional 555-01xx range.