100 MB YAML sample

A YAML file of exactly 104,857,600 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 100 MB sample, test or dummy YAML file.

sample-yaml-100mb.yaml

100 MB104,857,600 bytes

Download 100 MB YAML

Created in your browser and, in browsers that can stream to disk, sent straight to your downloads list; this can take a minute. No sign-up.

Type: application/yaml
SHA-256: 019d4758db0bbe670b870489eb04c4cbab34a20b6cc481307a5db0a2b1da35ca
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 426,757 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.

Records	426,757
Documents	1
YAML version	1.2 compatible
Indentation	2 spaces
Encoding	UTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-yaml-100mb.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 31 30 30 20  4d 42 29 0a 2d 2d 2d 0a |le (100 MB).---.|
00000030  67 65 6e 65 72 61 74 6f  72 3a 20 53 61 6d 70 6c |generator: Sampl|

Preview

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

Where 100 MB matters

A 104,857,600-byte file: the request-body limit of Cloudflare's Free and Pro plans, and the size above which GitHub rejects a file outright.

All 100 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 name	sample-yaml-100mb.yaml
Format	YAML (YAML Ain't Markup Language)
Extension	.yaml
MIME type	application/yaml
Size	104,857,600 bytes (100 MB)
Kind	Text
SHA-256	019d4758db0bbe670b870489eb04c4cbab34a20b6cc481307a5db0a2b1da35ca
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	Configuration

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-100mb.yaml     # Linux
shasum -a 256 sample-yaml-100mb.yaml # macOS

On Windows, run Get-FileHash sample-yaml-100mb.yaml -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 100 MB?: Yes. It is 104,857,600 bytes, which is 100 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 100 MB YAML file?: One YAML document with a "records" sequence of 426,757 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.

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