SampleTestFiles

100 KB PNG sample file

A PNG file of exactly 102,400 bytes. It is a valid Portable Network Graphics file, generated for this site and checked with an independent parser.

Download

sample-png-100kb.png

100 KB102,400 bytes

Download 100 KB PNG

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Type
image/png
SHA-256
824eac56ca8966c115b8ef02a566dea072a43109f2b21cc0959ffa7a14c616ea
Direct URL
https://sampletestfiles.com/downloads/png/sample-png-100kb.png

What is in this file

A 212 × 160 test card. The pixel data sits in a deflate stream made of stored blocks, so the size is set by the pixel count. 407 bytes of tEXt comment chunk bring the file to the exact size.

Dimensions212 × 160 px
Colour typeTruecolour RGB, 8 bits per channel
TransparencyNo
CompressionDeflate stream of stored blocks
InterlacedNo

First bytes of the file

The first 64 bytes of sample-png-100kb.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 d4 00 00 00 a0 08 02 00 00 00 fb 0f d5  |................|
00000020  98 00 00 01 8b 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 100 KB matters

A 102,400-byte file that sits exactly on the default request-body limit of Express. These are the default limits a file of this size is useful for testing:

SystemLimitNote
Express body parsers100 KB (102,400 bytes) by defaultA request body of exactly this size passes; anything larger returns 413 Payload Too Large.
Gmail message clippingAbout 102 KB of HTMLLonger messages are truncated behind a "view entire message" link.
Amazon DynamoDB items400 KB per item100 KB fits; the 500 KB sample does not.

All 100 KB sample files

Use this file for

  • Checking email size handling
  • Checking transparency handling
  • Testing image optimisation and conversion

Testing notes for PNG

  • Every chunk carries a CRC, so a strict decoder rejects a file that was altered in transit.
  • PNG compresses flat colour extremely well, so a tiny file can expand to a very large bitmap. Check dimensions before decoding.

PNG format reference

Technical details

File namesample-png-100kb.png
FormatPNG (Portable Network Graphics)
Extension.png
MIME typeimage/png
Size102,400 bytes (100 KB)
KindBinary
Signature89 50 4E 47 0D 0A 1A 0A
SHA-256824eac56ca8966c115b8ef02a566dea072a43109f2b21cc0959ffa7a14c616ea
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)
CategoryImages

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-100kb.png 'https://sampletestfiles.com/downloads/png/sample-png-100kb.png'
sha256sum sample-png-100kb.png     # Linux
shasum -a 256 sample-png-100kb.png # macOS

On Windows, run Get-FileHash sample-png-100kb.png -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.

Related files

Other PNG sizes

Other 100 KB files

Use cases

Guides

Questions about this file

Is this file exactly 100 KB?
Yes. It is 102,400 bytes, which is 100 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 100 KB PNG file?
A 212 × 160 test card. The pixel data sits in a deflate stream made of stored blocks, so the size is set by the pixel count. 407 bytes of tEXt comment chunk bring the file to the exact size.
Is there a sample with transparency?
Yes. The curated library includes a 512 × 512 PNG with an alpha gradient.