PDF 转 PNG

Scale 1.0x renders at 72 pixels per inch of page, so a Letter page becomes 612 by 792 pixels. The default 2.0x doubles that to 1224 by 1584, and 3.0x gives 1836 by 2376, which is 216 pixels per inch.

Not directly. The slider tops out at 3.0x, about 216 DPI on a standard page, and there's no field for entering a custom DPI in this tool.

No. Pages are drawn onto a white background, so areas with no content come out white rather than transparent, even though PNG supports transparency.

Every page is converted; there's no page-range field. Pull out the pages you need with Extract Pages first, then convert that smaller file.

A one-page PDF downloads as filename.png. Multi-page documents download as filename_pngs.zip containing page_1.png, page_2.png, and so on in document order.

PNG is lossless, so a full page at 2.0x is often several megabytes, especially for scans and photos. If some compression is acceptable, PDF to JPG or PDF to WebP produce far smaller images from the same pages.

Visible markup such as highlights, stamps, and filled form fields is rendered as it appears on the page. The text inside pop-up comments isn't drawn, only the note icon.

No. Rendering uses PDF.js inside your browser and the ZIP is built locally, so the document never leaves your computer. If the PDF needs a password, you're asked for it first.