{
  "date": "2026-09-12",
  "method": "Free web compressor: original-format compression followed by WebP conversion; original dimensions retained",
  "qualityMatched": false,
  "description": "Same source files uploaded to TinyPNG's free web compressor. Original-format compression was followed by automatic WebP conversion for the same three images. No resizing was selected. Downloaded outputs were decoded with Sharp to verify dimensions and measured from their file bytes. yaSEO measurements are in results.json.",
  "rows": [
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      "source": "/image-lab/backpack.png",
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      "sourceSha256": "f93975c1b74c885cc6c612dad267f515598ad5d4e646267f8ce7b63e10bd55fc",
      "format": "png",
      "width": 1200,
      "height": 900,
      "output": "/image-lab/backpack-tinypng.png",
      "outputBytes": 655756,
      "outputSha256": "2772f0e40c2846cdd625538bdece118a823e4b025c7d2b7aa78fa116085b60b2"
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    {
      "image": "tangerines",
      "source": "/image-seo-sample.jpg",
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      "sourceSha256": "1d840e1f50fc89d27caaae365d75389687d407700e3c3d35394ad7c249bbd200",
      "format": "jpeg",
      "width": 1200,
      "height": 900,
      "output": "/image-lab/tangerines-tinypng.jpg",
      "outputBytes": 154863,
      "outputSha256": "fb9dcc25aa1dbcc1d8af2bf1fd7a9b7a13496240b05356158a26a4af782e5e57"
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      "image": "interface",
      "source": "/image-seo-audit.png",
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      "sourceSha256": "14755b67fefdf977aa88aabf644ef37a3bac857092c53eecd8693de2bda8feea",
      "format": "png",
      "width": 459,
      "height": 742,
      "output": "/image-lab/interface-tinypng.png",
      "outputBytes": 25142,
      "outputSha256": "631606b24219794688f67424163826480d5cad9cbbcc616e36e9007268059167"
    },
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      "image": "backpack",
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      "sourceSha256": "f93975c1b74c885cc6c612dad267f515598ad5d4e646267f8ce7b63e10bd55fc",
      "format": "webp",
      "width": 1200,
      "height": 900,
      "output": "/image-lab/backpack-tinypng.webp",
      "outputBytes": 86278,
      "outputSha256": "ddaa208d04476f067f2adb538d4925033f5e3a763ba500267c8eca9d39293aaa"
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      "image": "tangerines",
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      "sourceSha256": "1d840e1f50fc89d27caaae365d75389687d407700e3c3d35394ad7c249bbd200",
      "format": "webp",
      "width": 1200,
      "height": 900,
      "output": "/image-lab/tangerines-tinypng.webp",
      "outputBytes": 139574,
      "outputSha256": "869045ac41463d3da333d884a57bbbee48edb98456f017b8824c037ce88c664c"
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}