Are my photographs uploaded to build the PDF?
No. The images are read from your device, assembled into a document in this tab and handed to your downloads. Photographs of identity documents and paperwork are exactly the files worth being careful with, and the simplest check is to disconnect from the network before building one: it still works.
Does converting reduce the quality of my photographs?
No. JPEG data is embedded into the document exactly as it is, with no decode and no second encode, so each page is pixel-identical to the file you added. That is also why the document is not smaller than its images.
Why is the PDF the same size as all my pictures added together?
Because it essentially is those pictures, in a container. Three JPEGs totalling 3,549,756 bytes produced a 3,551,383 byte document. The extra 1,627 bytes are the page structure. Nothing is compressed on the way in.
How do I control the order of the pages?
Drag rows in the list before creating the document. It reads top to bottom, and the filenames play no part, so photographs numbered awkwardly by a camera can still be put in the right sequence without renaming anything.
Can I mix JPG and PNG in the same document?
Yes. Both are embedded directly, and any other format your browser can decode is converted to JPEG on the way in. A document can contain a mixture without anything special being done.
Will the pages be A4 or letter sized?
Neither by default. Each page is created at the pixel dimensions of the image on it, so a set of photographs at different resolutions produces pages of different sizes. For consistent printing, resize the images to matching dimensions first.
Can I add a whole folder at once?
You can select many files in one go, but the picker takes files rather than directories. Select the contents of the folder and they all arrive in the list together.
How many images can I combine?
There is no imposed limit. Memory is the real one: every image and the finished document are held in the tab at once, so a hundred high-resolution photographs are much happier on a laptop than a phone.
Can I use iPhone photos saved as HEIC?
It depends on the browser rather than on this page. Apple's own has the decoder built in; Chrome and Firefox on most platforms do not, and the file simply will not open. Setting the camera to Most Compatible, which makes it write JPEG, avoids the question entirely and is worth doing before a batch of scanning.
Can I add page numbers, margins or a header?
No. The document is images on pages and nothing else; there is no text layer, no template and no annotation. A PDF editor is the right tool if the result needs anything added to it.
Is the original image file changed?
Not at all. The pictures are read and a new PDF is written to your downloads. Everything on your disk stays exactly as it was, so you can rebuild the document in a different order as often as you like.
Does this work without an internet connection?
Yes, once the page has loaded. Building a PDF is done entirely in your browser, so no connection is needed afterwards and only a fresh reload depends on the cache.
Is there a file size limit?
There is no limit imposed by us, because there is no server tier to enforce one. The real constraint is your device's available memory, since the whole file is held in RAM while it is processed. Very large files are slower on phones than on a laptop.
Do I need to create an account?
No. There is no sign-up, no email, and no usage tracking tied to an identity. The tool works the first time you open it.