Merge PDF Online
Combine multiple PDFs into one file. Drag to reorder.
100% free, no signup. Your file is processed entirely in your browser and never uploaded, then e-sign in one click when you are ready.
Drop your document here and sign it now. PDF, Word and Excel all work: a .docx or .xlsx is laid out in your browser exactly as it was written, so there is nothing to convert first. Add a signature, a date, a company stamp or a watermark, then download it sealed. Free to start, no account, and the file is never uploaded to open it.
How to merge pdf in 3 steps
- Upload your PDF, Open the Merge PDF tool and add your PDF. Files are processed in your browser and never uploaded.
- Merge PDF, Combine multiple PDFs into one file. Drag to reorder.
- Download, Download your file instantly, 100% free, no signup, no watermark.
One document instead of an email with six attachments
Merging matters most at the moment of submission. An application, a claim, a tender or a mortgage file is usually a set: the form, the identity document, the proof of address, the statements. Sent as separate files they arrive out of order, get separated, and the one that goes missing is always the one that holds up the decision.
The order is the part people get wrong. Set it before merging rather than after, because reordering a merged file means splitting it again. Put the covering document first: whoever opens it should know what they are looking at from page one.
What happens to signatures and forms when you merge
This is worth knowing before rather than after. Merging rebuilds the file, so a cryptographic signature applied to one of the source documents will no longer validate in the merged one. That is not the tool being destructive, it is the signature doing its job: it covers the bytes of the document it signed, and the merged document is a different set of bytes.
The rule that follows is simple and saves a lot of rework: assemble first, then sign. If a document was already signed and has to go into a bundle, keep the signed original as well, and send the bundle alongside it rather than instead of it.
Form fields behave similarly. Two documents with fields of the same name will collide, so flatten the forms before merging if the values matter.
Frequently asked questions
Is the Merge PDF tool free?
Yes. Merge PDF is 100% free with no signup. Your file is processed entirely in your browser and never uploaded to a server.
Do I need to install anything?
No. It runs in any modern browser on desktop or mobile, no app, no plugin, no account.
Is my file private?
Yes. Files are processed locally in your browser, so they never leave your device.
Will merging break a signature?
Yes, if the source was signed with a cryptographic signature. The merged file is different bytes, so the signature no longer matches. Assemble the bundle first, then sign it.
Can I merge a Word file with a PDF?
Convert the Word file to PDF first, then merge, and you can do both here. A .docx cannot be merged into a PDF directly because they are not the same kind of file.
Is there a limit on how many files?
There is no arbitrary cap. The practical limit is your device’s memory, since the merge happens in your browser rather than on a server.