{
  "checked_on": "2026-10-25",
  "scope": "Original English fixtures, desktop browser and 390px browser-width check. Not a physical-phone test, not a compression ratio guarantee.",
  "method": "Files selected in the tool, compressed, downloaded, reopened and rendered. All six output pages visually inspected. Text, page boxes, hyperlinks and default-mode embedded image data independently compared with the inputs.",
  "runs": [
    {
      "input": "text-and-links.pdf",
      "output": "text-and-links-compressed.pdf",
      "mode": "keep",
      "before_bytes": 11269,
      "after_bytes": 2924,
      "pages": [
        {
          "page": 1,
          "text_equal": true,
          "decoded_page_commands_equal": true,
          "page_box_equal": true,
          "link_targets": [
            "https://pdfmdtools.com/"
          ],
          "image_pixels_untouched": true,
          "images_after": []
        },
        {
          "page": 2,
          "text_equal": true,
          "decoded_page_commands_equal": true,
          "page_box_equal": true,
          "link_targets": [
            "https://pdfmdtools.com/"
          ],
          "image_pixels_untouched": true,
          "images_after": []
        }
      ],
      "input_sha256": "d8d6290a2b4b3b5b4478d020432bddde2e64ff95135d24586ff4d5b2bd308bb4",
      "output_sha256": "0a4b67acd65affea7b32ce55798ba8dd0f00ed116d5e386ee90fa147f2972f00"
    },
    {
      "input": "image-heavy.pdf",
      "output": "image-heavy-kept.pdf",
      "mode": "keep",
      "before_bytes": 2379982,
      "after_bytes": 2379327,
      "pages": [
        {
          "page": 1,
          "text_equal": true,
          "decoded_page_commands_equal": true,
          "page_box_equal": true,
          "link_targets": [],
          "image_pixels_untouched": true,
          "images_after": [
            [
              1800,
              2400
            ]
          ]
        },
        {
          "page": 2,
          "text_equal": true,
          "decoded_page_commands_equal": true,
          "page_box_equal": true,
          "link_targets": [],
          "image_pixels_untouched": true,
          "images_after": [
            [
              1800,
              2400
            ]
          ]
        }
      ],
      "input_sha256": "d02f3cc88121bd2530a487eab6677e5a858635b6f7e3dc0752b5c06284cbbfd2",
      "output_sha256": "0a601e97abd14d335fb8652be41231b34a6bd92d3fd0096ddc9c3e3491e77382"
    },
    {
      "input": "image-heavy.pdf",
      "output": "image-heavy-compressed.pdf",
      "mode": "images",
      "before_bytes": 2379982,
      "after_bytes": 354201,
      "pages": [
        {
          "page": 1,
          "text_equal": true,
          "decoded_page_commands_equal": true,
          "page_box_equal": true,
          "link_targets": [],
          "image_pixels_untouched": false,
          "images_after": [
            [
              1500,
              2000
            ]
          ]
        },
        {
          "page": 2,
          "text_equal": true,
          "decoded_page_commands_equal": true,
          "page_box_equal": true,
          "link_targets": [],
          "image_pixels_untouched": false,
          "images_after": [
            [
              1500,
              2000
            ]
          ]
        }
      ],
      "input_sha256": "d02f3cc88121bd2530a487eab6677e5a858635b6f7e3dc0752b5c06284cbbfd2",
      "output_sha256": "5e8b60681a4d52cc77cff5800e796aa4daef1d1bb61ab7bba6465cc2912fa034"
    }
  ],
  "default_mode_render_comparison": "All four default-mode output pages matched the original render pixels at the comparison resolution.",
  "repeat_optimized_file": {
    "input_bytes": 2924,
    "download_bytes": 2924,
    "saved_bytes": 0,
    "original_download_byte_identical": true
  },
  "narrow_browser": {
    "width": 390,
    "document_client_width": 375,
    "document_scroll_width": 375,
    "file_selection_conversion_download_completed": true,
    "download_byte_equal_to_desktop": true
  },
  "rejected_inputs": [
    {
      "file": "encrypted.pdf",
      "message": "Encrypted PDFs are not supported. Use an unprotected copy.",
      "downloadVisible": false
    },
    {
      "file": "form.pdf",
      "message": "Forms and signed or certified PDFs are not supported. Keep the original file.",
      "downloadVisible": false
    },
    {
      "file": "too-many-pages.pdf",
      "message": "Choose a PDF with 1 to 60 source pages.",
      "downloadVisible": false
    },
    {
      "file": "malformed.pdf",
      "message": "This PDF could not be read safely. Try a valid, unprotected PDF.",
      "downloadVisible": false
    },
    {
      "file": "too-large.pdf",
      "message": "This PDF exceeds the 30 MiB input limit. Choose a smaller file.",
      "downloadVisible": false
    }
  ],
  "not_measured": [
    "physical-phone performance",
    "physical OS drag and drop",
    "successful 60-page boundary",
    "15,000-object boundary",
    "image pixel-budget boundaries",
    "45/60-second timeout boundaries"
  ],
  "known_tradeoffs": [
    "JPEG mode is lossy. The fixture image changed from 1800 x 2400 to 1500 x 2000 pixels, with visible fine texture differences.",
    "Default-mode image-heavy reduction was only 655 bytes.",
    "Image lettering remains image lettering; no OCR is performed."
  ]
}