Merge PDF
Combine any number of PDFs, in the order you choose.
or drop them here — as many as you like
Nothing is uploaded. Your file never leaves this tab.
What merging PDFs is
Copying the pages of several documents into one new document in a chosen order. Page content, images and in-page links are carried across as objects; what does not survive is anything that referenced pages by object across the old file boundaries.
What this tool does that others do not
No file limit, because there is no server to meter
Merging is the one operation every service offers and almost every service caps, because each merge costs the provider compute time on a rented machine. This one runs on yours, so there is nothing to ration — the practical ceiling is available memory, which for text documents is thousands of pages.
iLovePDF allows 25 files per merge; Smallpdf gates batching behind a subscription; CloudConvert counts it against ten conversions a day.
Encrypted documents are decrypted, not papered over
Enter the password once and the pages are decoded properly before they are copied. This matters more than it sounds: several merge tools built on the common open-source library cannot decrypt at all, and merging an encrypted file through them produces blank pages with no error at all.
How to use it
Add every document, in any order
The list is reorderable afterwards, and there is no count to stay under.
Enter passwords where you are asked for them
That prompt is the tool telling you the file is genuinely encrypted, which is worth knowing before you distribute the merged result.
Check the order in the list, then combine
The output follows the list exactly, so the list is the only thing to verify.
Worked example
Real input, real figures.
Combining a hundred scanned pages
You give it
Twenty scanned PDFs of five pages each.
You get
One document, with no per-file cap and no queue. Scans are slower than text because the images are larger, but the constraint is your own memory rather than a limit somebody set.
Against an online merge service
| Aspect | This tool | iLovePDF and similar |
|---|---|---|
| Files per merge | Unlimited | 25, or fewer without an account |
| Encrypted input | Decrypted with your password | Often merged as blank pages |
| Your documents | Never leave the tab | Held for 1–2 hours |
| Cost of a second go | Nothing | Counts against a daily quota |
Guide
What it will not do
- Document-level bookmarks and the outline tree are not carried across. They reference pages by object rather than by number, and rebuilding that mapping across several documents is unreliable. Links inside a page remain.
Questions people ask
Straight answers. Each one links directly: copy the address after opening it.
Is there a limit on how many PDFs I can merge?
No. Nothing is uploaded, so there is no server time to pay for and no reason to cap you. The real limit is your device’s memory — a few thousand pages of text is unremarkable, and a hundred scanned pages at full resolution will be slower than ten.
Will the bookmarks and links survive?
Page content, images and internal formatting are copied intact. Document-level bookmarks and the outline tree are not carried across, because they reference pages by object rather than by number and rebuilding that mapping across several documents is unreliable. Links inside a page remain.
Can I merge a password-protected PDF?
Yes, if you know the password. You will be asked for it once and the document is decrypted properly before its pages are copied. This matters: several merge tools built on the common open-source library cannot decrypt at all, and merging an encrypted file through them produces blank pages with no error.
Nothing leaves your device
Your file is read into this tab and worked on there. It is never uploaded, which is why there is no queue, no daily limit and no account, and why the tool still works with the network switched off.
All 15 PDF tools, and what we do not build