Page ops in the tab, not on a server
Adobe Organize Pages and upload-based sites send the PDF away. This hub does not. pdf-lib in a Web Worker rebuilds the document from the pages you kept, in the order you set, with rotations applied to page boxes. Common mistakes: deleting the wrong thumbnail because you trusted a page number, or rotating only in a preview app that never saved. Download from this grid is the saved file.
What the grid is for
Cover → body → appendix. Kill blank duplex leftovers. Flip a sideways phone scan without rotating the whole packet. Do those in one session so you are not round-tripping through three tools.
Quality
Reassembly without recompression. Fonts and images stay as they were. If you also need a smaller file, Compress is a different (upload) product after you trim blanks locally.
Free vs Premium
Everyday organizing is free, no signup. Files over 100 MB need Premium. Redact and OCR are not this tool — they are called out as separate upgrades so we do not pretend a page shuffle is a discovery suite.