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Setting up your workspace on this device.
Combine multiple PDF files into one document.
Loading tool…
Setting up your workspace on this device.
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Merge PDF combines several PDF files into a single document in the order you choose. Each file shows a first-page thumbnail and page count, so you can drag the cards (or use the move buttons) to get the order right before you export. The merge happens inside your browser with pdf-lib, which means contracts, invoices and scans are never uploaded to a server — useful when the documents are confidential or simply too large for upload-based sites.
Add your PDFs
Drop two or more PDF files anywhere on the page, or choose them from your device.
Arrange the order
Drag the cards or use Move up / Move down. Each card shows the first page and the page count.
Merge and download
Press Merge PDFs. The combined file downloads immediately and can be sent straight to Compress PDF or Add Page Numbers.
There is no fixed limit. Because merging runs on your device, the practical limit is your browser’s memory — dozens of normal documents merge without trouble.
No. Pages are copied as they are, so text stays selectable and images keep their original resolution.
Encrypted PDFs cannot be read without the password, so they need to be unlocked first. The tool tells you which file could not be merged.
No. The files are read and combined inside this browser tab and are gone when you close it.
Yes. Merge PDF is completely free, with no account, no paywall, and no usage limits.
No. Merge PDF works instantly in any modern web browser — there is no software to install, no extension, and no sign-up.