aklappsFast, free online tools

Merge PDF

Combine several PDFs into one file — in the order you choose.

Add files
Drop PDF files here

or use the button below — PDF files only

0 files Total size: 0 KB Drag to reorder
Merged file
No file yet
Merged on your device. Nothing is uploaded or saved.
Ready. Add PDFs to start.

How to merge PDFs online

Add your PDF files, drag them into the order you want, then click Merge PDFs. The combined file is built locally in your browser and ready to download in seconds.

  • Works in modern browsers (Chrome, Edge, Safari, Firefox).
  • If a PDF is password-protected, remove the password first and try again.
  • Very large PDFs may take longer and use more memory.

Private by design

Your PDFs never leave your device. There are no uploads, no accounts, and nothing is stored on a server — the merge happens entirely in your browser.

Tip: merge in smaller batches if you run into memory limits with many large files.

Frequently asked questions

How do I merge PDF files?

Add the PDFs you want to combine, drag them into the order you want, then click Merge and download the single combined PDF.

Can I reorder the files before merging?

Yes. Drag the files in the list, or use the up and down controls, to set the page order.

Is there a file limit or watermark?

No limits and no watermark. It is completely free.

Are my PDFs uploaded to a server?

No. Merging happens entirely in your browser; your files never leave your device.

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