Merge PDF — Free
Combine multiple PDF files into a single document. Free to run. No card. Email only if you want to download. Add email later for larger uploads or e-signature.
Drop files here
or click to browse · .pdf · Max 25 MB per file
How to Merge PDF
Upload your PDF files
Drag to reorder if needed
Click 'Merge PDFs' to combine
Download your merged PDF
Common questions
Frequently Asked Questions
How do I merge PDF files online for free?
Upload your PDF files to ZiaSign, drag to reorder them, click 'Merge PDFs', and download the combined file. Free to run. No card. Email only to download. No extra watermark.
How many PDFs can I merge at once?
Anonymous users can merge up to 20 files within a 25 MB combined input limit. A free account raises the combined input limit to 100 MB. Pro supports up to 20 files per operation, while Max supports up to 100 files within the same 100 MB combined input limit.
Does the free PDF merger add a watermark?
No. ZiaSign never adds watermarks to your merged PDFs. The output is clean and professional, even on the free tier.
Will merging affect the quality of my PDFs?
No. ZiaSign merges PDFs without re-encoding — original quality, fonts, images, and formatting are fully preserved.
Is there a PDF combiner that works without installation?
Yes. ZiaSign works entirely in your browser. No software to install, no app to download — just upload, merge, and download.
Can I combine PDFs on my phone?
Yes. ZiaSign's PDF merger works on any device — iPhone, Android, iPad, or desktop — directly in your mobile browser.
Next step
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