How do I merge PDF files online for free without uploading them?
The PDF Merger combines your files entirely in your browser — nothing is uploaded to a server, so there's no file-size cap tied to an upload limit and your documents stay private.
Can I control the order the PDFs are merged in?
Yes, you can reorder your selected files before merging so the combined PDF comes out in the sequence you want.
Is there a limit on how many PDFs I can merge for free?
No — since everything runs locally in your browser, there's no artificial file-count or file-size limit like many "free" merge tools impose.