Image format

File di esempio PNG

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 file All to 50MB SHA256 verified Manifest included

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Quick facts

CategoriaImage

Total Files9

Extension.png

MIMEimage/png

Opens withChrome/Firefox, Photoshop

ManifestJSON

Richiedi copertura correlata

Files first

PNG Sample Files — Download

Starter file

png_1000x600_sample_file_21KB.png · 20.1 KB

Scarica

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

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All (9) 50KB (6) 10MB (1) 25MB (1) 50MB (1)

50KB PNG 10MB PNG

Nome file	Dimensione	MIME	Scarica
png_1000x600_sample_file_21KB.png .png Starter `SHA256 17643f66be24...`	20.1 KB	`image/png`	Scarica
png_100x100_sample_file_5KB.png .png `SHA256 f1eef2b7e4d1...`	4.3 KB	`image/png`	Scarica
png_2000x1200_sample_file_36KB.png .png `SHA256 e6e4885b4f37...`	35.7 KB	`image/png`	Scarica
png_500x300_sample_file_13KB.png .png `SHA256 9af726abe3a9...`	12.0 KB	`image/png`	Scarica
png_ocr_noise_sample.png .png Realistic `SHA256 cb7cf2486f66...`	42.0 KB	`image/png`	Scarica
png_receipt_scan_sample.png .png Realistic `SHA256 361a115695b4...`	4.4 KB	`image/png`	Scarica
png_sample_file_10MB.png .png Large `SHA256 6745b7e94d59...`	10.0 MB	`image/png`	Scarica
png_sample_file_25MB.png .png Large `SHA256 ddb96117df14...`	25.0 MB	`image/png`	Scarica
png_sample_file_50MB.png .png Large `SHA256 5ad6ffe2296c...`	50.0 MB	`image/png`	Scarica

Use cases

PNG Testing Workflows

Upload Testing

PNG for Upload Testing

Apri formato PNG

Parser Regression

PNG for Parser Regression

Apri formato PNG

QA Automation

PNG for QA Automation

Apri formato PNG

Compare and decide

PNG Format Comparisons

PNG vs WebP

Scegli tra PNG lossless e WebP moderno per grafica e delivery web.

Open Comparison

BMP vs PNG

Compare raw bitmap simplicity against compressed lossless PNG portability.

Open Comparison

Best Image Format for Web Performance Best Image Format for Print Workflows Best Format for Transparent UI Assets How to Convert BMP to PNG

More image formats: TIFF BMP GIF SVG JPEG AVIF

FAQ and reference

PNG File FAQ

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.

Manifest RFC 2083 / ISO 15948

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.

Matrice di fixture

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

Apri matrice

Pack di workflow

Image Extraction Fixture Pack

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