{
  "name": "CreatorZip production-browser compression test",
  "identifier": "creatorzip-browser-compression-test-2026",
  "version": "2026-09-08",
  "canonicalUrl": "https://creatorzip.app/guides/creatorzip-browser-compression-test",
  "observedOn": "2026-09-08",
  "reviewedOn": "2026-09-08",
  "isAccessibleForFree": true,
  "keywords": [
    "browser video compression",
    "local video compression",
    "H.264 MP4 compression",
    "start and end video trimming",
    "CreatorZip production test"
  ],
  "variableMeasured": [
    "input bytes",
    "output displayed file size",
    "output duration",
    "output frame dimensions",
    "displayed reduction percentage",
    "preview readiness"
  ],
  "input": {
    "kind": "synthetic moving test pattern with 1kHz tone",
    "durationSeconds": 8,
    "widthPixels": 1280,
    "heightPixels": 720,
    "framesPerSecond": 30,
    "videoCodec": "H.264",
    "pixelFormat": "yuv420p",
    "audioCodec": "AAC",
    "audioSampleRateHz": 48000,
    "bytes": 6021805,
    "displayedSize": "5.7MB"
  },
  "runs": [
    {
      "id": "full-duration",
      "workflow": "compress",
      "preset": "Best balance",
      "outputDurationSeconds": 8,
      "outputWidthPixels": 1280,
      "outputHeightPixels": 720,
      "outputDisplayedSize": "981KB",
      "displayedReductionPercent": 83,
      "previewReady": true
    },
    {
      "id": "trimmed-range",
      "workflow": "trim-and-compress",
      "preset": "Best balance",
      "keptRangeSeconds": {
        "start": 1,
        "end": 6
      },
      "outputDurationSeconds": 5,
      "outputWidthPixels": 1280,
      "outputHeightPixels": 720,
      "outputDisplayedSize": "602KB",
      "displayedReductionPercent": 90,
      "previewReady": true
    }
  ],
  "claimBoundary": "These observations verify two runs with one synthetic source on the live site. They do not establish a typical compression ratio, objective visual or audio quality, processing speed, cross-device performance, or universal codec compatibility.",
  "citation": "CreatorZip, ‘CreatorZip Browser Compression Test: Method and Result,’ observed and reviewed September 8, 2026, https://creatorzip.app/guides/creatorzip-browser-compression-test."
}