Is it safe to merge PDF files online with AziPDF?

Yes, completely. AziPDF processes all PDFs entirely inside your browser using JavaScript (pdf-lib). Your files are never uploaded to any server. Everything happens locally on your device, so your data stays 100% private.

How do I combine multiple PDF files into one?

Open AziPDF Merge PDF, upload your PDF files, drag the thumbnails to set the order, then click Merge PDF. Your files are combined instantly and downloaded as a single PDF to your device.

Can I reorder PDF pages before merging?

Yes. After uploading, drag and drop the PDF file thumbnails to arrange them in any order. The merge respects the exact order you set.

Is there a file size or page limit for merging PDFs?

No. There is no file size limit because everything runs in your browser — not on a server. Most devices handle hundreds of pages and files up to 500 MB without any issues.

Can I rotate pages before merging?

Yes. Each uploaded file has individual rotation controls (↻ button on its thumbnail). You can also apply a global rotation preset — 90°, 180°, or 270° — to all files at once using the sidebar settings.

Do I need to create an account or sign up?

No. AziPDF is completely free with no registration, login, or subscription required. There are no daily limits, no watermarks, and no restrictions. Upload, merge, and download instantly.

Does merging reduce PDF quality or damage the content?

No. AziPDF uses pdf-lib to copy pages losslessly. All images, fonts, vector graphics, form fields, and formatting are preserved exactly as in the original PDFs with no quality loss.

How is AziPDF different from iLovePDF or Smallpdf?

AziPDF processes files 100% in your browser with no server upload, unlike iLovePDF and Smallpdf which upload your files to their servers. AziPDF also has no file size limits, no daily usage caps, and no watermarks — it is genuinely free without restrictions.

What format is the merged output file?

A single merged PDF file downloaded directly to your device. There is no ZIP archive — just one ready-to-use PDF document.

Can I merge PDFs on mobile?

Yes. AziPDF is fully mobile-responsive and works on any smartphone or tablet browser. Touch drag-and-drop reordering is supported on all touch devices.