Merge PDF
Runs locally in your browser. Nothing leaves your device.Merge multiple PDF files locally in your browser into one new PDF using a custom order.
How it works
- 1
Add PDFs
Choose at least two local PDF files to merge.
- 2
Set the order
Move the files into the desired order with the arrow buttons and set the output filename.
- 3
Merge and download
Start the merge and download the generated PDF file.
Good to know
Merge PDF combines any number of PDF files directly in your browser into a single document. After adding files, you can move them up or down with arrow buttons — that order determines exactly the page order in the result. The generated file's name can be set freely.
Processing runs entirely locally in the browser; files are not uploaded. Because merging creates a new PDF file, any existing digital signatures are no longer cryptographically valid in it.
Typical use cases
Combine multiple scans into one document
Combine individually scanned pages, invoices, or forms into one continuous PDF instead of managing several separate files.
Assemble offers and contracts from separate documents
Combine a cover page, main document, and attachments that exist as separate PDFs into a single file for sending or archiving.
Finalize the order before merging
Sort the added files with the arrow buttons into exactly the order in which the pages should appear in the result.
Tips for better results
Check the order before you start
The displayed file order is carried over one to one into the page order of the result — check it before merging instead of reordering the result afterward.
Give the output a descriptive name
Use the output filename field to name the result meaningfully right away, instead of renaming it manually after downloading.
Features
Freely set the order
Move added PDFs up or down with arrow buttons before they are merged.
Merge locally
Processing happens directly in the browser; PDF files are not uploaded.
One file with a name of your choice
The result is exactly one merged PDF file, whose name can be set before downloading.
Frequently asked questions
How many PDFs can I merge?
There is no fixed limit on the number of files. Each file has a recommended size of up to 50 MB and a hard limit of 200 MB.
Are my PDF files uploaded while merging?
No. Merging runs entirely locally in the browser; the files never leave your device.
Can I still change the order of the files?
Yes, as long as the merge hasn't started yet. Move the files up or down with the arrow buttons.
What happens to digital signatures when merging?
Merging creates a new PDF file. Existing digital signatures in the source files are no longer cryptographically valid in it.
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