100 KB BMP sample file
A BMP file of exactly 102,400 bytes. It is a valid Windows bitmap file, generated for this site and checked with an independent parser.
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sample-bmp-100kb.bmp
100 KB102,400 bytes
Download 100 KB BMP
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- Type
- image/bmp
- SHA-256
fb3f6f6464184301c736d0b9ec6399efa5f9f0520ee28780e117b8126d6ce7cd- Direct URL
https://sampletestfiles.com/downloads/bmp/sample-bmp-100kb.bmp
What is in this file
An uncompressed 213 × 159 test card. 586 bytes of unused space between the header and the pixel array bring the file to the exact size.
| Dimensions | 213 × 159 px |
|---|---|
| Bit depth | 24-bit RGB |
| Compression | None (BI_RGB) |
| Header | BITMAPINFOHEADER (40 bytes) |
| Row order | Bottom-up |
First bytes of the file
The first 64 bytes of sample-bmp-100kb.bmp as a hex dump: offset, bytes, then the same bytes as text. The BMP signature is 42 4D.
00000000 42 4d 00 90 01 00 00 00 00 00 80 02 00 00 28 00 |BM............(.|
00000010 00 00 d5 00 00 00 9f 00 00 00 01 00 18 00 00 00 |................|
00000020 00 00 80 8d 01 00 13 0b 00 00 13 0b 00 00 00 00 |................|
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|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:
| System | Limit | Note |
|---|---|---|
| Express body parsers | 100 KB (102,400 bytes) by default | A request body of exactly this size passes; anything larger returns 413 Payload Too Large. |
| Gmail message clipping | About 102 KB of HTML | Longer messages are truncated behind a "view entire message" link. |
| Amazon DynamoDB items | 400 KB per item | 100 KB fits; the 500 KB sample does not. |
Use this file for
- Checking email size handling
- Testing decoders for legacy formats
- Testing size limits with naturally large images
Testing notes for BMP
- Some validators accept BMP by MIME type but have no decoder for it, which fails later in the pipeline.
- Row padding and bottom-up order are the usual causes of skewed or upside-down images in hand-written decoders.
Technical details
| File name | sample-bmp-100kb.bmp |
|---|---|
| Format | BMP (Windows bitmap) |
| Extension | .bmp |
| MIME type | image/bmp |
| Size | 102,400 bytes (100 KB) |
| Kind | Binary |
| Signature | 42 4D |
| SHA-256 | fb3f6f6464184301c736d0b9ec6399efa5f9f0520ee28780e117b8126d6ce7cd |
| 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-bmp-100kb.bmp 'https://sampletestfiles.com/downloads/bmp/sample-bmp-100kb.bmp'
sha256sum sample-bmp-100kb.bmp # Linux
shasum -a 256 sample-bmp-100kb.bmp # macOSOn Windows, run Get-FileHash sample-bmp-100kb.bmp -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 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 BMP file?
- An uncompressed 213 × 159 test card. 586 bytes of unused space between the header and the pixel array bring the file to the exact size.
- What bit depth are the BMP samples?
- 24-bit RGB with no compression and no colour table.