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Four-up is the handout layout: enough of the page survives to follow along and annotate, and a 40-page deck becomes ten sheets. Body text gets small — roughly A6 per page on A4 — so it is right for slides, drawings and anything with large type, and wrong for dense print. This page opens the tool already set to four.
This runs in your browser. The file is not uploaded, there is no account to create, and nothing is added to the document you download.
Also searched for: 4 pages per sheet pdf, four pages on one page pdf, print 4 slides per page pdf, pdf 4 up handout. It is the same tool whichever way you found it.
For slides, diagrams and large type, yes — that is what handouts are. For dense body text it is a stretch: each page lands at about A6 on an A4 sheet. If the document is mostly small print, two-up is the better trade.
In a 2×2 grid, reading order left to right and then down, so the sequence is the one you expect when you scan the sheet.
Yes — export the deck as a PDF, run it through here at four per sheet, and the result prints as a handout from any printer, with the layout baked into the file rather than set in a print dialogue.
No. The file is opened, changed and written by this browser tab — it is never sent to a server, so there is no queue to wait in and nothing to delete afterwards. Once the page has loaded you can turn the network off and the tool still works.