200 KB BIN sample file

A BIN file of exactly 204,800 bytes. It is a valid Binary test file file, generated for this site and checked with an independent parser. Use it wherever you need a 200 KB sample, test or dummy BIN file.

sample-bin-200kb.bin

200 KB204,800 bytes

Download 200 KB BIN

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Type: application/octet-stream
SHA-256: a3d13b83f00ac5eec3eb0138b984d7fac9a9fed1db499bf020dbf730406f16a7
Direct URL: https://sampletestfiles.com/downloads/bin/sample-bin-200kb.bin

What is in this file

204,800 pseudo-random bytes from a seeded generator, so every build of the file is identical and compression cannot shrink it.

Content	Pseudo-random bytes
Compressible	No
Structure	None

First bytes of the file

The first 64 bytes of sample-bin-200kb.bin as a hex dump: offset, bytes, then the same bytes as text.

00000000  74 78 0a 72 89 b9 64 c7 9e 9a 28 b1 63 0c 99 e3  |tx.r..d...(.c...|
00000010  94 58 d5 2e 45 d8 94 a4 48 f5 66 12 5e f6 8e e2  |.X..E...H.f.^...|
00000020  e2 b6 8c 9c 5f 74 f7 0f 74 51 6b da 0b 89 cd a4  |...._t..tQk.....|
00000030  19 e4 b5 a2 b7 90 f1 57 d3 69 9e fb 1c d1 a9 3b  |.......W.i.....;|

Preview

BIN files cannot be shown in a browser. Download the file and open it in an application that reads BIN, such as curl, wget and browser download managers.

Where 200 KB matters

A 204,800-byte file: twice the default body limit of most API frameworks, and a common cap for photo and signature uploads on application forms. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Express body parsers	100 KB by default	Rejected with 413 unless the limit is raised.
Amazon DynamoDB items	400 KB per item	200 KB fits, even after base64 encoding takes it to about 273 KB.
Azure Service Bus, Standard tier	256 KB per message	Fits as raw bytes, but not once base64-encoded.

All 200 KB sample files

Use this file for

Testing image compression targets
Checking resumable and chunked uploads
Verifying checksums after transfer

Testing notes for BIN

A file of zeros, as produced by many quick commands, compresses to almost nothing, which makes transfers look far faster than they are.
Because application/octet-stream says nothing about content, strict upload filters reject these files. That is itself a useful test.

BIN format reference

Technical details

File name	sample-bin-200kb.bin
Format	BIN (Binary test file)
Extension	.bin
MIME type	application/octet-stream
Size	204,800 bytes (200 KB)
Kind	Binary
SHA-256	a3d13b83f00ac5eec3eb0138b984d7fac9a9fed1db499bf020dbf730406f16a7
Created	2026-10-10
Validation	Exact size, signature bytes and structure checked when the file was generated
Preview	Not available for this file; details only
Source	Generated for this site; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Testing

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-bin-200kb.bin 'https://sampletestfiles.com/downloads/bin/sample-bin-200kb.bin'
sha256sum sample-bin-200kb.bin     # Linux
shasum -a 256 sample-bin-200kb.bin # macOS

On Windows, run Get-FileHash sample-bin-200kb.bin -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.

Related files

Questions about this file

Is this file exactly 200 KB?: Yes. It is 204,800 bytes, which is 200 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 200 KB BIN file?: 204,800 pseudo-random bytes from a seeded generator, so every build of the file is identical and compression cannot shrink it.
Is a .bin sample safe to download?: Yes. It is inert data: random bytes that are not executable and have no structure for any program to interpret.

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