Merge PDF
Combine several PDFs into one, in the order you choose. The files are read by your browser and never leave your device — no upload, no account, no watermark.
Drop files here
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Accepts .pdf · Up to 20 files at a time · up to 150 MB each "Upload" and "download" here mean your browser reading a file from this device and writing one back to it. Nothing is sent to a server — open your browser's network panel and watch: no request carries your file.
FAQ
Does merging re-compress the pages?
No. The pages are copied across as they are — the same compressed streams, untouched — so text stays selectable, vectors stay vectors and scans stay exactly as sharp as they were. You can see it in the output size: merging a 307-page manual with a 33-page spec, 4.25 MB of input in total, produced a 4.22 MB file. The flip side is that this cannot make a PDF smaller; shrinking one means re-encoding the images inside it, which is a different job.
How do I control the order?
The list is the order, and there are three ways to set it: drag a row, nudge it with the arrows, or press Order by name to settle the whole list at once. That last one sorts numerically rather than as text, so chapter-2 lands before chapter-10 — the opposite of what a plain alphabetical sort does, and the reason file pickers so often hand documents over in the wrong order in the first place. Each row also shows its first page, because two scans called scan_0007 and scan_0008 are otherwise impossible to tell apart.
Do bookmarks and the table of contents survive?
The bookmarks do, grouped under one heading per file so you can still tell which chapter came from where. This is not something merging gives you for free — a PDF outline lives in the document catalogue rather than on any page, so copying pages leaves it behind, and this tool used to return a 307-page reference guide with zero bookmarks. Each file's tree is now read and rewritten against its new page numbers. What still does not come across are the internal cross-references: that same guide had 735 links pointing at named destinations, and the destination table is catalogue-level in a way that cannot be remapped. A restored bookmark also opens at the top of its page rather than at the exact scroll position it originally named.
What about fillable form fields?
The fields keep their appearance but stop being fillable. The widgets are page annotations and do come across; the form dictionary that ties them together is not part of any page, so the merged file shows the boxes and their current contents as static artwork. If you need a form to stay interactive, merge around it rather than through it.
How many files, and how large?
Up to 150 MB per file and 300 MB for the batch. That ceiling exists because everything is held in your browser's memory rather than on a server — there is no queue to put the work in. Page count matters more than size, though: a 150 MB scan of 180 pages opens instantly, while a 150 MB document of 14,736 pages takes about 19 seconds just to read.
Can I merge a password-protected PDF?
Not directly — it is refused with a message rather than processed. We could parse the encrypted streams as if they were plain, but the result would be a file that opens to garbage, which is worse than a clear no. Open it in a reader, save an unprotected copy, and merge that.
PDF converter
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- Sign PDFDraw or type your signature, drop it where it belongs on the page, and download the signed PDF.
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- Add page numbersPut page numbers on a PDF — any corner, any starting number, on the pages you choose.
- Add PDF bookmarksBuild a PDF outline from the contents page, or from the headings when there is none.