{
  "measuredOn": "2026-09-28",
  "tool": "PHOTOGIO HEIC converter",
  "toolPath": "/tools/heic-converter",
  "environment": {
    "platform": "Windows",
    "browser": "Chromium 154 (headless Edge automation)",
    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/154.0.0.0 Safari/537.36 Edg/154.0.0.0"
  },
  "method": "One HEIC test input was uploaded separately through the actual conversion page for JPG, PNG and WebP. Results were downloaded from the result page. Pillow 12.1.1 inspected the output formats, dimensions and EXIF entries. SHA-256 and byte counts identify the files.",
  "settings": {
    "jpg": {
      "quality": 0.92
    },
    "png": {
      "qualityArgument": 1
    },
    "webp": {
      "intermediateFormat": "PNG",
      "quality": 0.92
    },
    "qualityIsUserSelectable": false,
    "resize": false
  },
  "input": {
    "file": "/examples/heic-20260928/ceiling-input.heic",
    "format": "HEIC",
    "bytes": 352723,
    "sha256": "928f8661c6f46ea73208036e872f7fb7b4b59b0a43314dd406d2955c17eb9ea5",
    "width": 1280,
    "height": 720,
    "dimensionsEvidence": "Provider manifest and all three decoded output dimensions agree.",
    "primaryBrand": "heic",
    "originalFilename": "landscape-hd.heic"
  },
  "source": {
    "provider": "HEIC.Best",
    "downloadUrl": "https://heic.best/samples/heic/landscape-hd.heic",
    "manifestUrl": "https://heic.best/samples/manifest.json",
    "license": "CC0-1.0",
    "licenseEvidenceUrl": "https://heic.best/samples/LICENSE-CC0.txt",
    "sourceListUrl": "https://heic.best/samples/source-jpg/SOURCES.json",
    "sourcePhotographTitle": "! Bright Lights Ceiling !.jpg",
    "creator": "Accusedtoppat",
    "sourcePhotographUrl": "https://commons.wikimedia.org/wiki/File:!_Bright_Lights_Ceiling_!.jpg",
    "provenanceEvidence": "The provider links this HEIC to its landscape-hd.jpg preview. The preview and the decoded output depict the same ceiling-light photograph listed in its sources and the Wikimedia file. The manifest does not contain a direct source-photo ID mapping.",
    "preparation": "The provider encoded a photograph into this HEIC test file. This is not an iPhone camera original."
  },
  "results": [
    {
      "requestedFormat": "jpg",
      "file": "/examples/heic-20260928/ceiling-jpg.jpg",
      "format": "JPEG",
      "width": 1280,
      "height": 720,
      "bytes": 195676,
      "sha256": "1a026c2692c6253428b53e33b6f703088bc2806a627cf687ce91bdc168aae08f",
      "exifEntries": 0
    },
    {
      "requestedFormat": "png",
      "file": "/examples/heic-20260928/ceiling-png.png",
      "format": "PNG",
      "width": 1280,
      "height": 720,
      "bytes": 1668468,
      "sha256": "c230de83df907b9769559189a024fdc4cc2faf224252c68f48112d80ea4ef98d",
      "exifEntries": 0
    },
    {
      "requestedFormat": "webp",
      "file": "/examples/heic-20260928/ceiling-webp.webp",
      "format": "WEBP",
      "width": 1280,
      "height": 720,
      "bytes": 149416,
      "sha256": "05cb1aeb31aaeffc9a08bd15c76b98d61ee6cb13ee02161ac2d721adc9f351ec",
      "exifEntries": 0
    }
  ],
  "limitations": [
    "One input and one Windows browser environment; not a test of all iPhone, HEIF, HDR or Live Photo variants.",
    "Output quality settings were fixed by the tool, not matched for equal perceived quality across codecs.",
    "Zero output EXIF entries observed by Pillow does not establish absence of every possible metadata type.",
    "The tool exports the first decoded image of a multi-image container; this limitation was checked in source code, not tested with this single-image sample.",
    "No processing speed benchmark or general best-compression claim is made."
  ]
}