Remove unwanted pages from a PDF online for free. No registration or software installation is needed—just upload your file, delete PDF pages you don’t need, and save the updated PDF.

No. The Delete PDF Pages tool is free and needs no sign-up. Just upload a PDF, delete unwanted pages, and save what's left.
Yes. You can select and remove multiple non-consecutive pages.
Not always. Internal links pointing at a removed page will break, and cross-references to page numbers may now be wrong, so walk through the document and check everything before you save.
Usually, but not by much on its own. Most of a PDF's weight sits in images and fonts. Smallpdf includes a compression option at the export step.
Not while the restrictions are in place. Documents with enhanced security features are meant to prevent modification, so ask the document owner for the appropriate permissions.
Not reliably once you've exported and closed the file. The export creates a new PDF, and the pages you removed only survive if you kept a copy. Make a backup copy of the original before you start.