Merge PDFs.
Arrange the pages.
Combine PDF files, reorder or rotate pages, and extract only the pages you need.
01 / INPUT → 02 / OUTPUTPut the pages in order.
Up to 30 MB per file / 60 MB total / 150 pages. Files stay on your device.
Drag pages to reorder, or use the arrow buttons. Rotate pages. Uncheck or remove the ones you don’t need.
Choose your PDFs to start arranging.
For standard, unlocked PDFs. Rebuilding a PDF can change forms, bookmarks or digital signatures. Use a separate workflow for signed documents, and check the downloaded result.
The details, in plain language.
Merge: add multiple files, arrange the pages and download one PDF. Extract: select the pages you want and download them together. Reorder or rotate: use the controls below each thumbnail.
You can add more PDFs to the current set. Clear PDFs discards the working set. The original files on your device are unchanged.
Encrypted PDFs, PDF text editing, reliable form preservation and secure redaction are not supported. This page rebuilds selected pages; it does not promise to preserve every document-level feature.
What does PDF Stack do?
PDF Stack is a free browser tool to merge PDFs and organize pages. Add standard unlocked PDFs, arrange their thumbnails, select the pages to keep and download one rebuilt PDF. Files are processed on your device without a server upload.
How to merge and organize PDF pages
Choose one PDF or several.
Add PDFs from your device. Limits are 30 MB per file, 60 MB in total and 150 pages. You can add more files to the current set.
Arrange and select pages.
Drag thumbnails or use the arrow buttons to reorder pages. Rotate sideways pages. Uncheck or remove pages you do not want in the result.
Download and review.
Click Download PDF to save the selected pages as one PDF. Open the saved file and check page order, rotation and document features before sharing it.
When this tool helps
Combine an application or report pack
Merge a cover sheet, report and supporting documents in the order the recipient expects. The original PDFs on your device are unchanged.
Keep just a few pages from a long PDF
Choose one PDF and uncheck the pages you do not need. Download the selected pages together. This extracts pages into a new PDF; it is not secure redaction or text removal.
PDF Stack questions, answered
How do I merge PDF files without uploading them?
Choose multiple PDFs in PDF Stack, arrange their pages and click Download PDF. The PDF libraries run in your browser and build the output locally; the selected files are not sent to UnjamKit.
Can I reorder PDF pages online?
Yes. Drag a page thumbnail or use its arrow buttons. The downloaded PDF follows the current thumbnail order for the pages still selected.
How do I rotate a sideways PDF page?
Use the rotate control on its thumbnail, then download the PDF. Review the saved file to confirm the orientation. The source PDF is unchanged.
Can I extract selected pages or remove pages from the output?
Yes. Leave the pages you want checked, or remove unwanted thumbnails, then download the selection. The result is one PDF containing the selected pages, not a separate file for every page.
Will forms, bookmarks and digital signatures stay intact?
Not reliably. Rebuilding pages can change or omit document-level features, including forms, bookmarks and signatures. Use a separate workflow for signed documents, and check the output before relying on it.
Can this unlock, compress, edit or redact a PDF?
No. Use standard unlocked PDFs. Password-protected PDFs, PDF compression, text editing and secure redaction are not supported. Removing a page is not a promise to remove sensitive content from all retained pages or document structures.