Can I reorder PDFs before merging?

Yes. Drag files or thumbnails to change the order, then merge and download one combined file.

Are my PDFs uploaded to a server?

No. Merging runs locally in your browser. Your files are not sent to Surmado's servers.

Is there a limit on how many PDFs I can merge?

There's no hard limit. Browsers comfortably handle dozens of files. Very large files may slow your tab depending on your device.

Is merging PDFs free?

Yes. No signup, no usage cap, no premium tier. Merge as many files as you need.

Does merging change the quality of my PDFs?

No. Pages are copied byte-for-byte from each source PDF into the merged file. Image quality and text fidelity are preserved.

Can I merge password-protected PDFs?

Encrypted PDFs need to be unlocked in the source application first. The merger reads PDFs locally and can't prompt for passwords.

Merge PDF Files

Combine multiple PDFs into one file. Drag to reorder, then download. Everything happens in your browser.

Your files stay on your device. No uploads. No tracking. No cookies.

Drop PDF files here

or click to browse. You can add multiple files.

How it works

Merge PDF reads files locally in your browser, combines them in the order you set, and outputs a single document. Drag thumbnails to reorder. There's no server in the loop and no upload.

When to use this

Use it for combining invoice pages into one tidy file, merging a stack of scanned documents, or assembling a multi-part report into a single deliverable. It's especially useful when the PDFs you're combining contain sensitive information you'd rather not hand to an unknown server.

Why this tool is different

A strict Content Security Policy on this page blocks outbound network requests. No analytics, no cookies, no upload. Your PDFs stay on your device. Read why we built free tools that never touch your files.

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