500 KB YAML sample

A YAML file of exactly 512,000 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 500 KB sample, test or dummy YAML file.

sample-yaml-500kb.yaml

500 KB512,000 bytes

Download 500 KB 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: bb88f939522d5b92a070504bce39d140ffe110724d53ec9170147abc3d10c242
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 2,121 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	2,121
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-500kb.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 35 30 30 20  4b 42 29 0a 2d 2d 2d 0a |le (500 KB).---.|
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 500 KB matters

A 512,000-byte file: larger than most API body limits, smaller than most upload limits. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Amazon DynamoDB items	400 KB per item	500 KB cannot be stored as a single item.
Express body parsers	100 KB by default	Rejected unless the limit is raised.
nginx request body	1 MB by default (client_max_body_size)	Accepted with room to spare.

All 500 KB sample files

Use this file for

Checking email size handling
Testing converters between YAML and JSON
Testing configuration loaders and linters

Testing notes for YAML

Loading untrusted YAML with a full loader can construct arbitrary objects in some libraries; always use the safe loader.
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.

YAML format reference

Technical details

File name	sample-yaml-500kb.yaml
Format	YAML (YAML Ain't Markup Language)
Extension	.yaml
MIME type	application/yaml
Size	512,000 bytes (500 KB)
Kind	Text
SHA-256	bb88f939522d5b92a070504bce39d140ffe110724d53ec9170147abc3d10c242
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-500kb.yaml     # Linux
shasum -a 256 sample-yaml-500kb.yaml # macOS

On Windows, run Get-FileHash sample-yaml-500kb.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 500 KB?: Yes. It is 512,000 bytes, which is 500 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 500 KB YAML file?: One YAML document with a "records" sequence of 2,121 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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