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Merge PDF Files Free

Combine PDFs online in seconds. Files never leave your device.

Drag & drop PDF files here

or click to browse from your device

100% private — files are processed in your browser and never uploaded to a server.

How to merge PDF files online

  • Click "Select PDF Files" or drag and drop the PDFs you want to combine.
  • Reorder the files using the up and down arrows so pages appear in the order you want.
  • Click "Merge PDFs" to combine them into a single document.
  • Download your merged PDF — no watermark, no signup required.

Why use SmallPrep's PDF merger

Unlike most online PDF tools, SmallPrep merges your files entirely in your browser using client-side processing. Your documents are never uploaded to a server, which means faster merging and complete privacy — ideal for contracts, resumes, or any sensitive paperwork.

  • No file uploads — everything happens on your device
  • No file size limits imposed by a server
  • No signup, no watermark, no daily usage cap
  • Works on desktop and mobile browsers

Frequently asked questions

Is it safe to merge PDFs here?

Yes. Your PDFs are processed locally in your browser using JavaScript — they're never sent to a server, so nothing leaves your device.

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

No. You can merge as many files as your browser's memory allows, with no artificial cap.

Can I change the order of pages before merging?

Yes. Use the up and down arrows next to each file to reorder them before merging.

Does merging add a watermark?

No. The merged PDF has no watermark and no branding added.

Files are processed entirely in your browser — nothing is uploaded to a server.