Are the images compressed again?

They are placed at their original resolution. A large photo makes a large page, so compress the images first if the result needs to be small.

Can I mix portrait and landscape?

Yes. Choose auto orientation and each page matches the shape of the image on it.

Yes — A4, Letter or the image size itself, with a margin if you want one. Fit keeps the whole photo visible; fill crops it to the page edges.

It is roughly the sum of the images, since they are embedded as they are. To make it smaller, compress the photos first or the PDF afterwards.

Turn photos and scans into a single PDF, with page size, margin and orientation controls.

Runs in your browser — nothing uploadednew

Are the images compressed again?: They are placed at their original resolution. A large photo makes a large page, so compress the images first if the result needs to be small.
Can I mix portrait and landscape?: Yes. Choose auto orientation and each page matches the shape of the image on it.
Can I control the page size and margins?: Yes — A4, Letter or the image size itself, with a margin if you want one. Fit keeps the whole photo visible; fill crops it to the page edges.
Will the PDF be much bigger than my photos?: It is roughly the sum of the images, since they are embedded as they are. To make it smaller, compress the photos first or the PDF afterwards.