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Merge PDF
Upload two or more PDF files, drag to reorder them, and download a single merged PDF.
How to merge PDF files
- Drop your PDF files onto the upload area, or click to browse.
- Drag the files to arrange them in the order you want them combined.
- Click “Merge PDFs” and download the single combined file.
Combine multiple PDF documents into one file. Add as many PDFs as you need, drag the pages into the order you want, and export a single merged PDF. The merge runs entirely in your browser, so your files are never uploaded to a server.
Frequently asked questions
Is there a limit on how many PDFs I can merge?
There is no fixed limit. Because the merge happens in your browser, very large jobs are only bounded by your device's available memory.
Are my files uploaded anywhere?
No. Merging is done locally in your browser with the pdf-lib library. Your PDFs never leave your computer.
Will bookmarks and form fields be kept?
Page content, text and images are preserved. Interactive form fields and document-level bookmarks may be flattened or dropped during the merge.