Top PDF Software for Encryption

Between them, the 10 PDF software on this page cover digital signature (8), watermarking (8), PDF reader (7) and annotations (7). 10 of them have written a profile you can read before you get in touch.

1. 1

   

   Foxit Reader

   Convert to PDF · Merge / Append · Digital Signature

   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…

   Write a review

   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 · Merge / Append · Digital Signature

   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.

   Write a review

   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 · Merge / Append · File Type Conversion

   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.

   Write a review

   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 · Merge / Append · File Type Conversion

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

   Write a review

   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 · Merge / Append · File Type Conversion

   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.

   Write a review
7. –

   

   Email to PDF for Outlook

   Convert to PDF · Merge / Append · Watermarking

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

   Write a review
8. –

   

   Kofax Power PDF Advanced

   Convert to PDF · Merge / Append · Digital Signature

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

   Write a review
9. –

   

   PDF4me

   Convert to PDF · Merge / Append · Digital Signature

   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…

   Write a review
10. –

    

    PDF24 Online Tools

    Convert to PDF · Merge / Append · Digital Signature

    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.

    Write a review
11. –

    

    PDFCreator

    Convert to PDF · Merge / Append

    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.

    Write a review

Articles

Related reading

Articles on this subject first, then the newest.

All articles

India

25 Oct 2026 · TrustList Editorial

Oracle and Cisco ship fixes that stop trusting eMudhra certificates

Oracle scores the Java gap 9.1 and pulls the eMudhra roots from every supported JDK line; Cisco lists Duo upgrades now, Meraki camera…

United States

22 Oct 2026 · TrustList Editorial

GoDaddy misses deadline to revoke 404,607 mis-profiled TLS certificates

The certificates are technically sound but did not match the policy GoDaddy published for its Starfield and GoDaddy hierarchies. Industry…

India

22 Oct 2026 · TrustList Editorial

eMudhra quits the global TLS certificate business after its CA key leak

The Bengaluru-listed trust company says its board chose to withdraw a week after eight intermediate keys were exposed. Its G1 RSA roots…