Merge PDF
Joins PDFs into one file in the order you set, on your own device.
Runs in your browser. The file or text you give it is not uploaded. Free, no account.
How it works
You have a stack of PDFs and need one file. Add them here, drag them into the order you want, and each shows its page count. The pages are copied into a single document in your browser. Nothing is uploaded, so the only limit is your device's memory.
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Add the files, then drag them into order or use the arrows. Each shows its page count.
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The pages are copied into one document in your browser. Nothing is uploaded, so there is no size limit beyond your device's memory.
What it does not do
Password-protected files must be unlocked first.
Form fields and bookmarks from the source files may not all carry over.
When a source is busy or a site does not answer, this tool says so. It never fills the gap with a guess.
Questions
Can I merge password-protected PDFs?
Not while they are locked. The tool copies page content into a new document, and an encrypted file cannot be read. Remove the password first with the Unlock PDF tool on this site, which also runs in your browser, then add the unlocked copy here.
Is there a file size limit?
Only your device's memory. The files stay on your computer: the pages are copied into one document in the browser, and nothing is sent anywhere. Large jobs are slower on a phone than on a desktop, and a tab with little free memory can fail on a very large set. Close other tabs if it stalls.
Why did my bookmarks and form fields disappear?
The tool copies pages, not everything attached to the file. Form fields and bookmarks from the source files may not all carry over, so a filled-in form can come through as plain page content. Keep the originals until you have checked the merged file, and flatten or export filled forms first if the answers matter.