Top PDF Software for Merge / Append

Between them, the 12 PDF software on this page cover convert to PDF (11), encryption (10), digital signature (8) and watermarking (8). 12 of them have written a profile you can read before you get in touch.

1. 1

   

   Foxit Reader

   Convert to PDF · Digital Signature · PDF Reader

   Foxit Reader belongs to the Foxit family of PDF tools. The company sells software for viewing, editing, signing and managing PDF files, and also provides tools for developers to…

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   Why #1: 24/7 support · Uptime SLA · SOC 2 Type II · GDPR compliant — as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

2. 2

   

   novaPDF

   Convert to PDF · Digital Signature · Encryption

   novaPDF works as a virtual printer on Windows computers. Any program with a Print menu, button or dialog can send a document to it, and the result is a standard PDF file.

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   Why #2: Launched 2005 — as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

3. 3

   

   Smallpdf

   Convert to PDF · File Type Conversion · Optical Character Recognition

   Smallpdf is a Swiss company that makes web-based document tools centred on PDF files. It describes its approach as stripping out unneeded features and concentrating on ease of use.

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   Why #3: Launched 2013 — as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

4. 4

   

   PDF Reader Pro

   Convert to PDF · File Type Conversion · Optical Character Recognition

   PDF Reader Pro is document software for viewing and working on PDF files across desktop and mobile.

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   Why #4: GDPR compliant — as stated on its own website, read 5 Oct 2026

   Not yet on record: client reviews, vetting.

5. Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
6. –

   

   DocShifter

   Convert to PDF · File Type Conversion · Digital Signature

   DocShifter converts documents to PDF automatically, adds enrichment and runs quality checks. It handles many input formats and stores the finished renditions where users want them.

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7. –

   

   Email to PDF for Outlook

   Convert to PDF · Encryption · Watermarking

   Email to PDF for Outlook is an add-in that equips Microsoft Outlook to convert emails and their attachments into PDF.

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8. –

   

   Kofax Power PDF Advanced

   Convert to PDF · Digital Signature · PDF Reader

   Kofax Power PDF Advanced is a PDF application aimed at business users. It lets staff make, convert, edit and share PDF documents.

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9. –

   

   PDF4me

   Convert to PDF · Digital Signature · PDF Reader

   PDF4me is an online document tool for working with PDF files. It combines simple everyday functions, such as joining pages, with more advanced ones, such as text recognition on…

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10. –

    

    PDFsam Basic

    PDFsam Basic is an open source desktop application for working with PDF files. The name stands for PDF Split and Merge.

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11. –

    

    Easy PDF

    Convert to PDF

    Online converter that turns scanned or regular PDFs into Word, Excel and image files, and creates PDFs from many file types

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12. –

    

    PDF24 Online Tools

    Convert to PDF · Digital Signature · PDF Reader

    PDF24 Online Tools is a set of web tools for common PDF problems. It brings together about 30 separate functions, each aimed at a specific task.

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13. –

    

    PDFCreator

    Convert to PDF · Encryption

    PDFCreator turns any printable document into a PDF on Windows. Users either print to it from the original application or convert from inside PDFCreator itself.

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