{
  "date": "2026-10-20",
  "Pillow": "11.3.0",
  "sample": "Original deterministic synthetic landscape, seed1190; not a photograph or WordPress screen",
  "original": "2400x1600 RGB PNG",
  "reference": "1200x800 Lanczos PNG; same dimensions for format comparisons",
  "settings": {
    "JPEG": "quality76 optimize progressive",
    "WebP": "quality75 method6",
    "AVIF": "quality50 speed6",
    "lowJPEG": "quality15"
  },
  "limits": "Quality scales are not equivalent across encoders; one illustration only; bytes are stored file bytes, not HTTP transfer or LCP",
  "rows": [
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      "file": "original.png",
      "bytes": 1847788,
      "width": 2400,
      "height": 1600,
      "sha256": "9f1535baa1f0c9ed2e16b4597f8927a4bddd36f0ec7c3a49442cd51ba86deca3",
      "reduction_vs_original_percent": 0.0,
      "reduction_vs_reference_percent": -152.73
    },
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      "bytes": 731142,
      "width": 1200,
      "height": 800,
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      "reduction_vs_original_percent": 60.43,
      "reduction_vs_reference_percent": 0.0
    },
    {
      "file": "sample.jpg",
      "bytes": 82846,
      "width": 1200,
      "height": 800,
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      "reduction_vs_reference_percent": 88.67
    },
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      "file": "sample.webp",
      "bytes": 42200,
      "width": 1200,
      "height": 800,
      "sha256": "9bfdf07a786064e9e92dfaddb59c230600abae123e3086bcb80461ba221612a5",
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      "reduction_vs_reference_percent": 94.23
    },
    {
      "file": "sample.avif",
      "bytes": 29377,
      "width": 1200,
      "height": 800,
      "sha256": "a9c1055cdd3698661639f8e24c103acb7565c8649d68775fbe972cd00bc691dd",
      "reduction_vs_original_percent": 98.41,
      "reduction_vs_reference_percent": 95.98
    },
    {
      "file": "low.jpg",
      "bytes": 17984,
      "width": 1200,
      "height": 800,
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      "reduction_vs_reference_percent": 97.54
    },
    {
      "file": "too-small.webp",
      "bytes": 3578,
      "width": 300,
      "height": 200,
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}