How to Merge PDF Files on iPhone and Android

To merge PDF files on a phone, import the documents into a PDF tool, arrange the files and individual pages, remove duplicates, and export one combined PDF. Reopen the result before sharing to verify page order, orientation, and completeness.

Prepare the files

Rename each source clearly and decide the intended order. If one file contains pages that belong in the middle of another, you need page-level reordering rather than simple file concatenation.

Merge PDFs on iPhone

Built-in Files and sharing actions vary by iOS version and workflow. For consistent page control, import the PDFs into Smart PDF, select the documents, arrange the pages, and save a new combined copy.

Merge PDFs on Android

Native options differ by manufacturer. A PDF app provides one workflow across devices: import, reorder, combine, review, and export.

Check the page order

Verify the first and last page, every section boundary, rotated pages, and any page numbers printed in the source documents. Remove accidental blank or duplicate pages.

Keep quality and file size balanced

Merging should not require aggressive compression. If the final file is too large, finish the merge first and then make a separate compressed copy. See how to compress a PDF without losing important quality.

Protect sensitive documents

Contracts, identification, health records, and financial documents require careful handling. Check the tool's privacy and security information and share only with intended recipients.

Smart PDF supports secure document processing alongside scanning, editing, annotation, signatures, conversion, OCR, and sharing.

Final merge checklist

• all source files included;
• correct page order;
• no blank or duplicate pages;
• readable text and signatures;
• clear filename;
• originals retained until verification.

Create the combined file

Open Smart PDF, import the source documents, arrange the final sequence, and export one shareable PDF without moving the job to a computer.