PDF Merger

Combine multiple PDF files into one, in any order.

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Files and text are processed locally in your browser. Tools that must reach the network say so explicitly.

About the PDF Merger

Combine several PDF documents into a single file, in exactly the order you want. The Toolcenter PDF Merger runs entirely in your browser, so your documents are never uploaded, and the output has no watermark or size cap. Add contracts, scans, invoices or report chapters and download one clean, merged PDF in seconds.

How to use it

1Drop or select the PDF files you want to combine.
2Drag the files up or down to set their final order.
3Remove any file you added by mistake.
4Click “Merge & download” to save the combined PDF.

Key features

Merge unlimited PDFs with no file-size limit
Reorder documents with simple up/down controls
Opens password-free and permission-locked PDFs where the viewer allows
No upload — files are processed on your device
No watermark on the output

Frequently asked questions

How many PDFs can I merge at once?+

There is no fixed limit. You can combine as many PDF files as your device has memory to handle, typically dozens at a time.

Will merging reduce the quality of my PDF?+

No. Pages are copied without re-compression, so text stays selectable and images keep their original resolution.

Are my documents uploaded anywhere?+

No. The merge happens locally in your browser using the pdf-lib engine, so nothing is sent to a server.

Can I merge password-protected PDFs?+

If a PDF only has owner/permission restrictions it will merge normally. Files locked with an open password must be unlocked first.

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