How do I merge PDF files?

Select two or more PDF files using the upload area (hold Ctrl/Cmd to select multiple). Click Merge. The tool combines all PDFs in order and downloads the merged result.

How many PDF files can I merge?

You can merge as many PDF files as you like. Be aware that very large PDFs may require significant browser memory.

Is the PDF uploaded to a server?

No. pdf-lib merges your PDFs entirely in your browser. Nothing is uploaded to any server.

Will the merged PDF preserve bookmarks and links?

Page content, images, and text are preserved. PDF bookmarks from the original files may or may not be preserved depending on the source PDFs.

Can I reorder pages before merging?

Currently, PDFs are merged in the order they are selected. Select your files in the desired order to control the merge sequence.

Merge PDF Files Online

Combine multiple PDF files into one document — browser-based with pdf-lib. No upload. No registration.

Your Privacy is Protected

Your files are processed entirely in your browser
No file upload — your video never leaves your device
No account or registration required
Files are not stored on any server

Supported Formats

Input Formats

PDF

Output Format

✓ PDF

Frequently Asked Questions

: Select two or more PDF files using the upload area (hold Ctrl/Cmd to select multiple). Click Merge. The tool combines all PDFs in order and downloads the merged result.

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