Put several PDFs together into a single file. Drag the files into the order you want, and download one combined PDF.
No fixed limit. Very large files depend only on how much memory your device has.
Every page is copied as it is, with its text, images and links. Fillable form fields are best flattened first with Flatten PDF.
No. Everything happens in your own browser, on your own device. Your files are never sent to a server, so nobody else can see or keep them.
Yes. There are no fees, no sign-up, no watermarks added by us and no daily limits. Your device does the work, which is why it can stay free.