Nothing is uploaded, and that is the point
Most JPG-to-PDF converters work by sending your images to a server, building the file there and handing back a download link. For a holiday snapshot that is merely wasteful. For a scanned ID, a signed contract or a medical document it is a genuine problem — the file sits on someone else's disk, and you have no way of knowing for how long.
Here the PDF is assembled in your browser. Open the network tab and watch: nothing leaves.
Fit to image, or a fixed page size
Fit to image gives each page the exact proportions of its picture. Nothing is cropped, nothing is padded — the right choice for photographs and for anything you will read on screen.
A4 forces every page to the same standard size, which is what you want when the document will be printed or filed. Add a margin if the images run to the edge, since most printers cannot reach it.
Frequently asked questions
Can I control the page order?
Yes, the images are added in the order you select them, and the list shows that order before you build the PDF.
Which formats are accepted?
JPG and PNG. Transparent areas of a PNG are rendered on white, since PDF pages have no transparency.
Is there a watermark?
No. The PDF is built by your browser and carries nothing but your images.
Is there a size limit?
Only your device's memory. Very large batches of high-resolution photographs will be slow before they fail.