Best Free PDF Encryption Software

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Compare the Top Free PDF Encryption Software as of December 2025

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What is Free PDF Encryption Software?

PDF encryption software is a type of program used to protect documents in the PDF format. With it, users can protect the contents of their documents by setting passwords and restricting certain editing permissions. It can also be configured to set expiration dates for documents, ensuring that they remain secure until a specified time. By encrypting PDFs, users are able to keep their sensitive information safe and secure from unauthorized viewing. Compare and read user reviews of the best Free PDF Encryption software currently available using the table below. This list is updated regularly.

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    pdfRest

    pdfRest

    Datalogics Inc.

    pdfRest API Toolkit was made by developers, for developers. Rapidly integrate PDF workflows with any business application, simply and seamlessly. pdfRest API Toolkit includes all of the PDF processing tools you'll need, to make your job easy. PDF to Word, Excel, PowerPoint, Image, Add to PDF, Query PDF, Extract Text, Convert to PDF, Convert to PDF/A, PDF/X, Compress PDF, Linearize PDF, Flatten Forms, Transparencies, Annotations, Layers, Merge /Split PDF, Encrypt/Decrypt PDF, Restrict PDF, Watermark PDF, Sign PDF, Redact PDF, Import/Export Form Data, Rasterize PDF, PDF to Markdown, XFA to Acroforms, Set Page Box, Create Blank PDF, Delete PDF, Convert PDF Colors, OCR PDF, API Polling, Upload Files, Zip Files. Get up and running fast with the pdfRest Postman Collection or start from functional sample code in NodeJS, .NET, JavaScript, Python, PHP, and cURL from the pdfRest GitHub repository. Gold-standard processing powered by Adobe® PDF Library™ ensures the highest quality results.
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    35 Ratings
    Starting Price: $0 per month
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