Processed in your browser

Merge PDF

Combine multiple PDFs in your browser. Drag files to reorder, or use Organize Pages to rearrange individual pages with thumbnails. Supports rotation, deletion, and image files.

📂

Drop PDF files here

or click to browse · Images (JPG, PNG, WebP) are auto-converted

What happens to your file

Processed in your browser

Your files are processed in this browser tab. They aren't sent to our servers or to anyone else.
The tool's code comes from greatestfiletools.com, including pdf-lib 1.17.1 and pdfjs-dist 4.10.38.
Those libraries download the first time the tool needs them.
Copies of your files and results aren't saved on this device, apart from what you download. The site stores your cookie choice, plus Google Analytics cookies if you accept them.
If you accept analytics cookies, Google Analytics records your visit. It doesn't receive your files or file names.

Checked on October 17, 2026 in Chromium, Firefox and WebKit by an automated test that records the browser's requests while it processes sample files. How the check works.

Report a problem with this tool. Please don't attach files that contain personal information.

FAQ

Is my PDF uploaded to a server?

No. Merging runs in this browser tab using pdf-lib and PDF.js. Your files aren't sent to our servers.

How many PDFs can I merge at once?

There is no hard limit. Practical limits depend on your device's memory — very large PDFs (hundreds of pages each) may be slow on low-memory devices.

Can I rearrange individual pages before merging?

Yes. Switch to "Organize Pages" view to see thumbnails of every page from every file. Drag pages to reorder, rotate them, or delete pages you don't need.

Can I merge password-protected PDFs?

Not yet. When you add an encrypted PDF (one with a password or with permission restrictions), the tool tells you and leaves it out, because it can't decrypt it. Save an unprotected copy from the app that opens it, then add that copy.

Can I add images (JPG, PNG) to the merge?

Yes. JPG, PNG, WebP, GIF and BMP images become one page each, sized to the image. A file the tool can't read is listed with the reason, and the other files are still added.

Will bookmarks and form fields be preserved?

Page content and page rotation are kept. Bookmarks (the outline) and working form fields are not carried over, and any digital signature is no longer valid in the merged file.