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How to Merge PDFs on Windows

Windows can open PDFs, but it can't combine them — and Adobe Acrobat's merge is a paid feature. The tool below does it free in your browser.

Add PDF files to merge

Select two or more PDF files

or drag and drop files here

Merging in your browser (no install)

  1. Click Choose files above, or drag the PDFs from Explorer into the drop zone. Ctrl-click selects several files at once.
  2. Arrange the order with the ↑ / ↓ arrows.
  3. Click Merge, then Download — the combined PDF lands in your Downloads folder.

The merging happens on your PC inside the browser tab. Your documents are not uploaded to a server — you can verify that in the browser's DevTools Network tab, which is worth doing with any online PDF site you trust with real documents.

What about the tools already on your PC?

  • Microsoft Edge / free Acrobat Reader — both open PDFs, neither can merge them. Acrobat's "Combine files" needs a paid plan.
  • Microsoft Print to PDF — can only print one document at a time; there is no way to queue several PDFs into one output.
  • Word — can import a PDF and re-save it, but it re-flows the layout and often breaks formatting. Fine for text, wrong tool for merging.

When a desktop app makes sense

If you merge large batches every day, an offline tool like PDFsam Basic (open source) is a reasonable install. For everything occasional, the browser tool above does the job without adding software to your machine.

Merge PDFs on other devices