SampleTestFiles

1 MB YAML sample file

A YAML file of exactly 1,048,576 bytes. It is a valid YAML Ain't Markup Language file, generated for this site and checked with an independent parser.

Download

sample-yaml-1mb.yaml

1 MB1,048,576 bytes

Download 1 MB YAML

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Type
application/yaml
SHA-256
a42e503e39cf45f407a593c71b69799d52b3c725326658c31c8c768358cc338b
Direct URL
https://sampletestfiles.com/downloads/yaml/sample-yaml-1mb.yaml

What is in this file

A single YAML document with a sequence of 4,336 mappings that use strings, numbers, booleans, dates, a flow sequence and a nested mapping. Comment lines at the end bring it to the exact size.

Records4,336
StyleBlock sequence of mappings
YAML version1.2 compatible
EncodingUTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-yaml-1mb.yaml, exactly as they appear in the file.

# SampleTestFiles sample YAML file (1 MB)
---
generator: SampleTestFiles
records:
  - id: 1
    name: "Ethan Zeller"
    email: ethan.zeller1@example.com
    active: true
    balance: 2769.84
    signup_date: 2021-07-10
    tags: [team, in]
    location:
      city: "Pune"
      lat: 18.59249

Preview

Shows the first 64 KB of the file.

Where 1 MB matters

A 1,048,576-byte file: exactly the default upload limit of nginx, Spring Boot and Next.js. These are the default limits a file of this size is useful for testing:

SystemLimitNote
nginx1 MB by default (client_max_body_size)A multipart upload of this file exceeds the limit by the size of the form boundaries.
Spring Boot multipart1 MB per file by default (max-file-size)A file of exactly 1 MB is at the limit.
Next.js API routes and Server Actions1 MB by defaultLarger bodies need the size limit raised in configuration.
Cloud Firestore documents1 MiB (1,048,576 bytes)The same number of bytes as this file.
Apache Kafka messagesAbout 1 MB by defaultBrokers reject larger records unless message.max.bytes is raised.

All 1 MB sample files

Use this file for

  • Download tests on mobile connections
  • Checking CI pipeline tooling
  • Testing converters between YAML and JSON

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 namesample-yaml-1mb.yaml
FormatYAML (YAML Ain't Markup Language)
Extension.yaml
MIME typeapplication/yaml
Size1,048,576 bytes (1 MB)
KindText
SHA-256a42e503e39cf45f407a593c71b69799d52b3c725326658c31c8c768358cc338b
Created2026-10-10
ValidationExact size, signature bytes and structure checked when the file was generated
PreviewAvailable on this page
SourceGenerated for this site; not copied from elsewhere
LicenceFree to use, modify and redistribute (terms)
CategoryConfiguration

Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Download from the command line and verify

Fetch the file with curl, then compare its checksum with the SHA-256 value above.

curl -o sample-yaml-1mb.yaml 'https://sampletestfiles.com/downloads/yaml/sample-yaml-1mb.yaml'
sha256sum sample-yaml-1mb.yaml     # Linux
shasum -a 256 sample-yaml-1mb.yaml # macOS

On Windows, run Get-FileHash sample-yaml-1mb.yaml -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.

Related files

Other YAML sizes

Other 1 MB files

Use cases

Guides

Questions about this file

Is this file exactly 1 MB?
Yes. It is 1,048,576 bytes, which is 1 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 1 MB YAML file?
A single YAML document with a sequence of 4,336 mappings that use strings, numbers, booleans, dates, a flow sequence and a nested mapping. Comment lines at the end bring it 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.