{
  "test_date": "2026-08-05",
  "measurement": "Exact file bytes divided by 1024; reader-facing label: KB",
  "source_policy": "All subjects are original deterministic drawings created by scripts/image-format-test/generate.py.",
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    "webp_codec": "1.6.0"
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      "encoder_settings": {
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    {
      "subject": "photograph",
      "format": "PNG",
      "width": 640,
      "height": 427,
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      "displayed_kb": "82.7",
      "encoder_settings": {
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      "filename": "public/blog/jpg-vs-png-vs-webp-file-size-test/test-outputs/photograph.png"
    },
    {
      "subject": "photograph",
      "format": "WebP",
      "width": 640,
      "height": 427,
      "bytes": 29096,
      "displayed_kb": "28.4",
      "encoder_settings": {
        "quality": 82,
        "method": 6,
        "lossless": false,
        "exact": true
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      "filename": "public/blog/jpg-vs-png-vs-webp-file-size-test/test-outputs/photograph.webp"
    },
    {
      "subject": "text-screenshot",
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      "width": 1200,
      "height": 800,
      "bytes": 65261,
      "displayed_kb": "63.7",
      "encoder_settings": {
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    },
    {
      "subject": "text-screenshot",
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      "height": 800,
      "bytes": 43968,
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      "encoder_settings": {
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    {
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}