Merge PDF Files

Guide & FAQ
Drop PDF files here Or click to choose them. Add as many files as you like, then drag to put them in order.

Guide: Merge PDF Files

Drop two or more PDF files onto the page, or choose them with the button. Each file gets a thumbnail of its first page, its page count and its size. Merging is free and unlimited: no daily task cap, no file-size cap, no sign-up and no watermark.

Put the files in order

The PDFs are joined from top to bottom. Drag the handle (the dotted grip on the left) to move a file, or use the up and down arrows, which also work with a keyboard and on phones. The Sort A-Z button orders files by name, treating numbers sensibly, so page-2 comes before page-10.

Merge and download

Press Merge. A progress bar shows how far along it is, and you can cancel at any time. You get one PDF with all pages in your chosen order. Rename the output in the File name box before downloading.

Good to know

  • Your files are processed inside your browser tab and are not uploaded. This tool makes no network request with your documents.
  • Very large jobs use a lot of memory. If your phone struggles, merge in smaller batches.
  • Password-protected files cannot be opened. Save an unprotected copy first.
  • Bookmarks and interactive form fields from the source files are not kept; page content is.

FAQ

Is there a limit on files or file size?

No. There is no daily cap and no size cap from us. The only limit is your own device memory, and the tool warns you when a job is very large.

Are my PDFs uploaded to a server?

No. Merging happens in your browser tab. Nothing is sent to a server.

Will the merged PDF have a watermark?

Never. There is no watermark, no sign-up and no account.

Can I merge a password-protected PDF?

Not directly. Remove the password in a PDF reader first and save an unprotected copy. The tool tells you which file is protected.

Do bookmarks and form fields survive?

Pages, text, images and links on the page are kept. Bookmarks (outlines) and interactive form fields of the source files are not carried over.

Open-source licences

  • pdf-lib: MIT
  • PDF.js (legacy build 3.11.174): Apache-2.0