Paste the link and tap “Open” — a preview appears. Choose paper size, margins and scale and tap “Save PDF”. The print window opens: on iPhone tap Share → “Save to Files”, on a computer choose “Save as PDF”.
Yes. The browser makes the PDF itself, so text stays text: you can search and copy it, and tables and headings flow across pages.
Yes, that's a good fit: S-1 prospectuses, 10-K and 10-Q reports on sec.gov are plain HTML pages. For long filings turn on “No images” and narrow margins to get fewer pages.
Pages built by scripts in the browser (social networks, many web apps) and pages behind a login reach the server empty. Look for a “print version” or a link to the document itself.
The junkbox.tools server loads the page, because a browser can't open another site directly. Scripts are removed and the page is kept only on your side — we store nothing.