| Name | Lines of code | Maintainability | Test coverage |
| lib/Layout/WatermarkBox.php | 65 | B 5 hrs | |
| lib/Layout/FontBox.php | 71 | A 0 mins | |
| lib/Layout/TableColumnBox.php | 77 | A 0 mins | |
| lib/Layout/InlineBlockBox.php | 81 | A 0 mins | |
| lib/Style/NumericValue.php | 83 | A 0 mins | |
| lib/Math.php | 92 | A 35 mins | |
| lib/Objects/Meta.php | 92 | A 35 mins | |
| lib/Objects/PdfObject.php | 97 | A 1 hr | |
| lib/Layout/TextBox.php | 99 | A 1 hr | |
| lib/Layout/TableCellBox.php | 99 | A 0 mins | |
| lib/Html/Element.php | 101 | A 35 mins | |
| lib/Objects/ImageStream.php | 127 | A 2 hrs | |
| lib/Style/Normalizer/Normalizer.php | 147 | C 7 hrs | |
| lib/Layout/TableRowBox.php | 161 | C 1 day | |
| lib/Html/Parser.php | 176 | C 1 day | |
| lib/Layout/ElementBox.php | 215 | F 3 days | |
| lib/Style/Color.php | 231 | A 25 mins | |
| lib/Layout/InlineBox.php | 282 | D 2 days | |
| lib/Layout/LineBox.php | 303 | D 2 days | |
| lib/Layout/Dimensions/BoxDimensions.php | 311 | D 2 days | |
| lib/Objects/Font.php | 436 | D 2 days | |
| lib/Document.php | 457 | D 2 days | |
| lib/Layout/BlockBox.php | 517 | F 4 days | |
| lib/Layout/Box.php | 679 | F 6 days | |
| lib/Page.php | 934 | F 1 wk | |
| lib/Layout/TableBox.php | 979 | F 1 wk | |
| lib/Style/Style.php | 1,259 | F 1 wk |