How many PDFs can I merge?

This tool accepts PDF, and you can select several at once. The files never leave your device, so there is no upload limit — the only ceiling is what your browser can hold in memory.

How is the page order determined?

Every page from the first listed PDF is added first, followed by every page from the next file. Reorder the file list before merging.

Can this merge password-protected or damaged PDFs?

The browser must be able to load each document with pdf-lib. Encrypted or malformed PDFs can fail and should be unlocked or repaired first.

Are bookmarks and interactive PDF features preserved?

The tool copies pages into a new document. Page content is retained, but document-level structures such as bookmarks, portfolios, or some interactive features may not carry over.

PDF Merger

LocalFree

Combine multiple PDF files into one, in the order you choose. Reorder, remove, and merge — entirely in your browser, no upload.

Drop PDF files here, or click to choose

Select two or more PDFs

About merging PDFs

Merging joins several PDF documents into a single file while preserving each page exactly. It’s useful for combining scanned pages, reports, or chapters before sharing or printing. This tool does it locally with pdf-lib, so your documents never leave your device — ideal for anything confidential.

How to use PDF Merger — Combine PDF Files

1Select at least two PDF files.
2Move files up or down to set the document order, and remove any file you do not need.
3Select Merge PDFs and download the combined document.

Frequently asked questions

How many PDFs can I merge?: This tool accepts PDF, and you can select several at once. The files never leave your device, so there is no upload limit — the only ceiling is what your browser can hold in memory.
How is the page order determined?: Every page from the first listed PDF is added first, followed by every page from the next file. Reorder the file list before merging.
Can this merge password-protected or damaged PDFs?: The browser must be able to load each document with pdf-lib. Encrypted or malformed PDFs can fail and should be unlocked or repaired first.
Are bookmarks and interactive PDF features preserved?: The tool copies pages into a new document. Page content is retained, but document-level structures such as bookmarks, portfolios, or some interactive features may not carry over.