50 KB PNG sample file

A PNG file of exactly 51,200 bytes. It is a valid Portable Network Graphics file, generated for this site and checked with an independent parser.

sample-png-50kb.png

50 KB51,200 bytes

Download 50 KB PNG

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Type: image/png
SHA-256: 113314da7f4fd58c55b9bd5c1671d730432552bbf1787c97f4ae2a5ecf56d913
Direct URL: https://sampletestfiles.com/downloads/png/sample-png-50kb.png

What is in this file

A 150 × 113 test card. The pixel data sits in a deflate stream made of stored blocks, so the size is set by the pixel count. 169 bytes of tEXt comment chunk bring the file to the exact size.

Dimensions	150 × 113 px
Colour type	Truecolour RGB, 8 bits per channel
Transparency	No
Compression	Deflate stream of stored blocks
Interlaced	No

First bytes of the file

The first 64 bytes of sample-png-50kb.png as a hex dump: offset, bytes, then the same bytes as text. The PNG signature is 89 50 4E 47 0D 0A 1A 0A.

00000000  89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52  |.PNG........IHDR|
00000010  00 00 00 96 00 00 00 71 08 02 00 00 00 b8 22 cd  |.......q......".|
00000020  8f 00 00 00 9d 74 45 58 74 43 6f 6d 6d 65 6e 74  |.....tEXtComment|
00000030  00 53 61 6d 70 6c 65 54 65 73 74 46 69 6c 65 73  |.SampleTestFiles|

Preview

Displays the file in your browser.

Where 50 KB matters

A 51,200-byte file, half of the default body limit in several web frameworks. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Express body parsers	100 KB by default	50 KB is accepted; 500 KB is rejected with 413 unless the limit is raised.
Base64 encoding	Adds 33 percent	50 KB becomes about 67 KB when embedded in JSON.

All 50 KB sample files

Use this file for

Testing document previews
Testing image uploads that must stay lossless
Checking transparency handling

Testing notes for PNG

Converting a transparent PNG to JPEG needs a background colour; pipelines that forget produce black backgrounds.
Every chunk carries a CRC, so a strict decoder rejects a file that was altered in transit.

PNG format reference

Technical details

File name	sample-png-50kb.png
Format	PNG (Portable Network Graphics)
Extension	.png
MIME type	image/png
Size	51,200 bytes (50 KB)
Kind	Binary
Signature	89 50 4E 47 0D 0A 1A 0A
SHA-256	113314da7f4fd58c55b9bd5c1671d730432552bbf1787c97f4ae2a5ecf56d913
Created	2026-10-10
Validation	Exact size, signature bytes and structure checked when the file was generated
Preview	Available on this page
Source	Generated for this site; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Images

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-png-50kb.png 'https://sampletestfiles.com/downloads/png/sample-png-50kb.png'
sha256sum sample-png-50kb.png     # Linux
shasum -a 256 sample-png-50kb.png # macOS

On Windows, run Get-FileHash sample-png-50kb.png -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 50 KB?: Yes. It is 51,200 bytes, which is 50 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 50 KB PNG file?: A 150 × 113 test card. The pixel data sits in a deflate stream made of stored blocks, so the size is set by the pixel count. 169 bytes of tEXt comment chunk bring the file to the exact size.
Why are the sized PNG samples stored without compression?: It makes the size exact and predictable: the pixel data is written in uncompressed deflate blocks, so byte count follows pixel count. The files are fully valid PNGs. For a normally compressed PNG, use the 1920 × 1080 test card.

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