Sample JPG, 3840 × 2160 (4K UHD)
A 4K baseline JPEG of the test card with light film grain: 8.3 megapixels, encoded at quality 90 with no chroma subsampling.
Download
sample-photo-3840x2160.jpg
1.84 MB1,931,177 bytes
Download JPG sample
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- Type
- image/jpeg
- SHA-256
09c9874b8c62a70498333d4b41456c88383c5d3d105d5982ffe4c79d8e088efb- Direct URL
https://sampletestfiles.com/downloads/samples/sample-photo-3840x2160.jpg
Why test with this file
A camera-sized image for testing resizing, thumbnail generation and pixel-count limits. Decoded, it occupies about 25 MB of memory as RGB, far more than its size on disk suggests.
| Dimensions | 3840 × 2160 px |
|---|---|
| Megapixels | 8.3 |
| Encoding | Baseline DCT, Huffman |
| Chroma subsampling | 4:4:4 |
| Quality | 90 |
| Metadata | JFIF header only, no EXIF |
What to check
After your application has processed sample-photo-3840x2160.jpg, confirm that:
- The dimensions are read as 3840 × 2160 before the whole image is decoded.
- A thumbnail is produced within your time limit, and the worker that makes it does not run out of memory.
- A responsive image set built from it keeps the 16:9 aspect ratio at every width.
First bytes of the file
The first 64 bytes of sample-photo-3840x2160.jpg as a hex dump: offset, bytes, then the same bytes as text. The JPG signature is FF D8 FF.
00000000 ff d8 ff e0 00 10 4a 46 49 46 00 01 01 00 00 01 |......JFIF......|
00000010 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 |.......C........|
00000020 03 03 03 04 03 03 04 05 08 05 05 04 04 05 0a 07 |................|
00000030 07 06 08 0c 0a 0c 0c 0b 0a 0b 0b 0d 0e 12 10 0d |................|Preview
Loads the whole 1.84 MB file in your browser.
Technical details
| File name | sample-photo-3840x2160.jpg |
|---|---|
| Format | JPG (JPEG image) |
| Extension | .jpg |
| MIME type | image/jpeg |
| Size | 1,931,177 bytes (1.84 MB) |
| Kind | Binary |
| Signature | FF D8 FF |
| SHA-256 | 09c9874b8c62a70498333d4b41456c88383c5d3d105d5982ffe4c79d8e088efb |
| 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-photo-3840x2160.jpg 'https://sampletestfiles.com/downloads/samples/sample-photo-3840x2160.jpg'
sha256sum sample-photo-3840x2160.jpg # Linux
shasum -a 256 sample-photo-3840x2160.jpg # macOSOn Windows, run Get-FileHash sample-photo-3840x2160.jpg -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.
Where it fits
- File upload testing
Test an upload form or endpoint with files of every size and type it should accept, and several it should refuse.
- Web development
Placeholder images, media, data and documents for building and demonstrating web interfaces.
- Performance testing
Large, predictable inputs for measuring throughput, memory use and processing time.