Private by design. Your files are processed by your own browser and never leave this device. There is no upload, no account and no cookies. The page's security policy only allows connections to Gumroad (only if you enter a Pro license key) and to Cloudflare Web Analytics, which counts the page view and never receives your files.
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Up to 20 PDFs at once, free · no page limit
How to merge PDFs
- Drop two or more PDF files.
- Put them in order with the arrows or Sort A–Z.
- Press Merge PDFs. The combined file is saved to your downloads.
Full guide: How to merge PDF files without uploading them. Need to pull pages out instead? Use PDF Split.
Questions
Are my PDFs uploaded?
No. The PDFs are combined inside your browser with the open-source pdf-lib library. Nothing is sent to a server, which makes it safe for contracts, tax forms and other private documents.
How many PDFs can I merge?
Up to 20 PDFs at once in the free version, with no page or size limit other than your device's memory. WBS Tools Pro removes the 20-file limit.
Can I change the order?
Yes. Use the arrows to move files up or down, or sort them A to Z by file name (numbers are sorted naturally, so 2 comes before 10).
Does it work with password-protected PDFs?
Not yet. Remove the password first, for example by opening the file and printing it to PDF, then merge.
Are links and form fields kept?
Page content, images and text are kept exactly. Interactive form fields and bookmarks from the original files may not carry over.