Image format

PNG Sample Files

PNG (.png) is a lossless raster image format supporting truecolor, palette, interlacing, and alpha transparency. Use sample .png files to test decoder compliance, color profile handling, and transparency rendering.

9 files All to 50MB SHA256 verified Manifest included
Quick facts
CategoryImage
Total Files9
Extension.png
MIMEimage/png
Opens withChrome/Firefox, Photoshop
ManifestJSON
Request Related Coverage
Files first

Start with one representative file.

Starter file

png_1000x600_sample_file_21KB.png · 20.1 KB

Download

Receipt Scan PNG

Clean scan-style PNG for OCR and receipt extraction tests.

png_receipt_scan_sample.png · 4.4 KB
Download Fixture

OCR-Noise PNG

Noisy grayscale PNG for OCR preprocessing and robustness checks.

png_ocr_noise_sample.png · 42.0 KB
Download Fixture
Filename Size MIME Download
.png Starter SHA256 17643f66be24...
20.1 KB image/png Download
.png SHA256 f1eef2b7e4d1...
4.3 KB image/png Download
.png SHA256 e6e4885b4f37...
35.7 KB image/png Download
.png SHA256 9af726abe3a9...
12.0 KB image/png Download
.png Realistic SHA256 cb7cf2486f66...
42.0 KB image/png Download
.png Realistic SHA256 361a115695b4...
4.4 KB image/png Download
.png Large SHA256 6745b7e94d59...
10.0 MB image/png Download
.png Large SHA256 ddb96117df14...
25.0 MB image/png Download
.png Large SHA256 5ad6ffe2296c...
50.0 MB image/png Download
Use cases

Pick the next task, not just the next file.

Upload Testing

PNG for Upload Testing

Open Format PNG

Parser Regression

PNG for Parser Regression

Open Format PNG

QA Automation

PNG for QA Automation

Open Format PNG
Compare and decide

Keep the next decision one step away.

PNG vs WebP

Choose between lossless PNG and modern WebP for graphics and web delivery.

Open Comparison

BMP vs PNG

Compare raw bitmap simplicity against compressed lossless PNG portability.

Open Comparison
FAQ and reference

Keep the operational details quiet.

Checksum Verification

Use checksums to confirm file integrity after download.

shasum -a 256 your_file_name_here
# Compare output with SHA256 values listed above.
Where is the machine-readable manifest?

Use the manifest when you need stable names, SHA256 values, and URLs for automation.

Validation Methodology
  • Validate MIME sniffing against extension and file signatures.
  • Test transparency, color profile, and resize pipelines.
  • Benchmark decode speed and memory use for larger dimensions.
Fixture Matrix

Use the curated PNG matrix to choose the right clean, edge-case, and broken fixtures for this format.

Open Matrix