About the image to pdf
Turning a handful of photos or scans into one PDF is the kind of task that should take ten seconds and usually involves handing your documents to a website you have never heard of. Identity documents, signed forms and receipts are exactly the files people convert, and exactly the files that should not be uploaded anywhere.
This converter builds the PDF in your browser. The images are read into memory, drawn onto pages and assembled locally; nothing is transmitted. That is both a privacy property and the reason it works on a slow connection or with no connection at all once the page has loaded.
Add as many images as you like and drag them into the order you want — page order is the thing most converters get wrong, usually sorting by filename and leaving you to reorder afterwards. Each image becomes one page, contained within the page rather than cropped, so nothing is cut off and nothing is stretched.
Page size defaults to A4 with US Letter available, plus a fit-to-image option that sizes each page to its own image, which suits screenshots and receipts where a fixed page would leave large empty margins. Orientation can follow each image automatically or be fixed, and the margin is adjustable.
For scanned documents, run the images through the image compressor first if the resulting PDF is larger than you need. A page from a phone camera is often several megabytes at full resolution, and the difference is rarely visible once it is a document rather than a photograph.