PNG Sample Files

Telechargements verifies avec metadonnees techniques et controles d'integrite.

Vue d'ensemble du format

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.

Pourquoi les equipes choisissent PNG : PNG is useful for scan-style grayscale fixtures, lossless OCR preprocessing, and document-image validation.

Statistiques rapides

Fichiers affiches11
Fichiers totaux11
CategorieImage
ManifesteJSON

Principaux flux pour PNG

  • Receipt and scan-image OCR preprocessing checks.
  • Lossless raster validation for document-image ingestion.
  • Baseline grayscale image extraction and thresholding tests.

Erreurs frequentes

  • Assuming any raster image is representative of OCR-oriented document scans.
  • Testing only clean images and skipping noisy or low-contrast inputs.
  • Ignoring image dimensions when benchmarking OCR throughput.

Etape suivante la plus rapide

Utilisez le chemin le plus court pour ce format : ouvrez la matrice, prenez le pack de workflow ou allez directement vers une taille utile.

Ouvrir la matrice PNG Telecharger Image Extraction Fixture Pack Ouvrir la page du pack Ouvrir 50KB PNG

Methodologie de validation

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

Tailles de telechargement recommandees

50KB Ouvrir

Fast image-ingest smoke tests.
10MB Ouvrir

Representative upload validation for large raster scans.
100MB Ouvrir

Stress image processing and storage flows.

Fixtures reels mis en avant

Receipt Scan PNG

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

png_receipt_scan_sample.png · 4.4 KB

Telecharger le fixture

OCR-Noise PNG

Noisy grayscale PNG for OCR preprocessing and robustness checks.

png_ocr_noise_sample.png · 42.0 KB

Telecharger le fixture

Packs de workflow

Image Extraction Fixture Pack

Bundle of PNG, JPEG, TIFF, and scan-style PDF fixtures for OCR workflows.

image_extraction_fixture_pack.zip · 382.3 KB

Telecharger le pack Ouvrir la page du pack Ouvrir la bibliotheque ZIP

Matrice de fixtures

Utilisez la matrice PNG pour choisir les bons fixtures propres, limites et casses pour ce format.

Ouvrir la matrice PNG Parcourir toutes les matrices

Pages de strategie liees

Guides du meilleur format

Best Image Format for Web Performance Best Image Format for Print Workflows

Recommandations par cas d'usage

Best Format for Transparent UI Assets

Comment convertir

How to Convert PNG to TIFF How to Convert PNG to WEBP How to Convert TIFF to PNG How to Convert WEBP to PNG

Telecharger les fichiers

All (11) 50KB (6) 10MB (1) 25MB (1) 50MB (1) 100MB (1) 250MB (1)

Pages de tailles populaires

10MB PNG 25MB PNG 50MB PNG 100MB PNG 250MB PNG

Pages par cas d'usage

PNG pour Upload Testing PNG pour Parser Regression PNG pour QA Automation PNG pour Performance Benchmark PNG pour API Integration PNG pour Security Scanning PNG pour Bulk Import Validation
Nom du fichier Taille MIME SHA256 Telecharger
png_1000x600_sample_file_21KB.png
.png 		20.1 KB image/png 17643f66be24d8baeb19498f6c28403b6e8f8151dc5f11d107b0ec5e5a43dbc1 Telecharger
png_100x100_sample_file_5KB.png
.png 		4.3 KB image/png f1eef2b7e4d1976f069748e0a097be0679d35e8b9bb3f60fcf1a902e688402c8 Telecharger
png_2000x1200_sample_file_36KB.png
.png 		35.7 KB image/png e6e4885b4f373fd0e1c2c0bbaf3c69ce5406147d72b03abbe7e787d76e7b7c44 Telecharger
png_500x300_sample_file_13KB.png
.png 		12.0 KB image/png 9af726abe3a978fa9ecb003ea445dd6956cb0f47ac12fd5793e7ed77512b4585 Telecharger
png_ocr_noise_sample.png
.png 		42.0 KB image/png cb7cf2486f666ad0f07acf9b5f765312cc929c24a28805cc8f8f48c0dc9823a1 Telecharger
png_receipt_scan_sample.png
.png 		4.4 KB image/png 361a115695b4d01d9b48356de97e9ea7048c84592375acf079c324104ed11b34 Telecharger
png_sample_file_100MB.png
.png 		100.0 MB image/png 20492a4d0d84f8beb1767f6616229f85d44c2827b64bdbfb260ee12fa1109e0e Telecharger
png_sample_file_10MB.png
.png 		10.0 MB image/png 6745b7e94d596702c12bcafb18681750c06a7ba6e709f42cee76a3440f8b4edc Telecharger
png_sample_file_250MB.png
.png 		250.0 MB image/png e9474e4cc673c0c227a6e807e04aa4ab1f88d3744243950a290869c53daa65df Telecharger
png_sample_file_25MB.png
.png 		25.0 MB image/png ddb96117df14c38a5ab39a72ed9c897b99267706264e2e146825d27f0f4e6a28 Telecharger
png_sample_file_50MB.png
.png 		50.0 MB image/png 5ad6ffe2296c780686e43a5a6eafa375c9fdba294157d8b17dc78421fef62f96 Telecharger

Verification du checksum

Utilisez les checksums pour confirmer l'integrite du fichier apres telechargement.

shasum -a 256 your_file_name_here
# Compare output with SHA256 values listed above.

Formats lies dans Image

JPEG (8) SVG (7) AVIF (6) TIFF (6) BMP (4) GIF (4) HEIC (4) WEBP (4) DCM (3) EPS (3) NII (3) PSD (3)

Comparer PNG avec des alternatives

PNG vs WebP

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

Ouvrir la comparaison

TIFF vs PNG

Contrast TIFF archival fidelity with PNG web/UI practicality.

Ouvrir la comparaison

Guides lies

API Error Taxonomy for File Pipelines

Define stable, actionable error classes for upload and processing APIs.

Lire le guide

Case Study: MIME Mismatch Blocking Legitimate Uploads

A production-style incident where strict type checks rejected real user files and how policy was corrected.

Lire le guide

Checksum Integrity Workflows

Use SHA256 manifests to guarantee fixture integrity in CI and production pipelines.

Lire le guide

Conversion Output Verification Playbook

Verify converted outputs for correctness, quality, and contract compliance.

Lire le guide