SampleTestFiles

3 MB YAML sample

A YAML file of exactly 3,145,728 bytes. It is a valid YAML Ain't Markup Language 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 YAML file.

Download

sample-yaml-3mb.yaml

3 MB3,145,728 bytes

Download 3 MB YAML

Created in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.

Type
application/yaml
SHA-256
9fd6ca334aab6e41376d3993864f55085bbb46b88b084fd91816520ddd3f07e9
Delivery
Created in your browser from static generator assets (how it works).

What is in this file

One YAML document with a "records" sequence of 12,968 mappings, each with strings, numbers, booleans, a date, a flow sequence and a nested mapping. Comment lines at the end bring the file to the exact size.

Records12,968
Documents1
YAML version1.2 compatible
Indentation2 spaces
EncodingUTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-yaml-3mb.yaml, exactly as they appear in the file.

00000000  23 20 53 61 6d 70 6c 65  54 65 73 74 46 69 6c 65 |# SampleTestFile|
00000010  73 20 73 61 6d 70 6c 65  20 59 41 4d 4c 20 66 69 |s sample YAML fi|
00000020  6c 65 20 28 33 20 4d 42  29 0a 2d 2d 2d 0a 67 65 |le (3 MB).---.ge|
00000030  6e 65 72 61 74 6f 72 3a  20 53 61 6d 70 6c 65 54 |nerator: SampleT|

Preview

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

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.

All 3 MB sample files

Use this file for

  • Finding the first upload limit in a new stack
  • Testing converters between YAML and JSON
  • Testing configuration loaders and linters

Testing notes for YAML

  • Unquoted values are typed by guesswork. In YAML 1.1 parsers the country code NO becomes false, and a version such as 1.10 becomes the number 1.1.
  • Loading untrusted YAML with a full loader can construct arbitrary objects in some libraries; always use the safe loader.

YAML format reference

Technical details

File namesample-yaml-3mb.yaml
FormatYAML (YAML Ain't Markup Language)
Extension.yaml
MIME typeapplication/yaml
Size3,145,728 bytes (3 MB)
KindText
SHA-2569fd6ca334aab6e41376d3993864f55085bbb46b88b084fd91816520ddd3f07e9
Created2026-10-23
ValidationSee 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.
PreviewAvailable on this page
SourceGenerated in your browser by this site's generator; not copied from elsewhere
LicenceFree to use, modify and redistribute (terms)
CategoryConfiguration

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-yaml-3mb.yaml     # Linux
shasum -a 256 sample-yaml-3mb.yaml # macOS

On Windows, run Get-FileHash sample-yaml-3mb.yaml -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.

Related files

Other YAML sizes

Other 3 MB files

Use cases

Guides

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 YAML file?
One YAML document with a "records" sequence of 12,968 mappings, each with strings, numbers, booleans, a date, a flow sequence and a nested mapping. Comment lines at the end bring the file to the exact size.
Are the samples a single YAML document?
Yes. Each file is one document with a top-level mapping and a sequence of records.