List of the Top 3 PDF Encryption Software for Linux in 2025

Experience seamless creation, review, and editing of PDF documents with this comprehensive PDF editor designed for Windows, Mac, and Linux platforms. PDF Studio offers an intuitive interface and serves as a reliable alternative to popular PDF editors like Adobe® Acrobat®, providing all essential PDF functionalities at a more budget-friendly price while ensuring complete adherence to PDF standards. Among its standard features, PDF Studio allows users to create PDFs, convert scanned documents to PDF format, and annotate or markup files with ease. Additionally, it includes precise measuring tools, the ability to fill out and save PDF forms, and options to secure documents through password protection. Users can manipulate pages by appending or deleting them, as well as create custom watermarks, headers, and footers. Advanced tools like loupe, pan & zoom, and rulers enhance the user experience, while integration with document storage solutions and DocuSign adds further convenience. Notably, it also supports PDF 2.0 standards, ensuring compatibility with the latest PDF advancements. For those seeking even more functionality, PDF Studio Pro encompasses all standard features with the addition of advanced tools. Users gain access to an interactive form designer, optical character recognition (OCR) for text recognition, and the ability to edit content, including text and images. Furthermore, the Pro version allows for redaction and sanitization of sensitive information, comparing multiple PDFs, optimizing document size, and digitally signing PDFs. Enhanced imposition features round out this powerful PDF editing suite, making it suitable for professionals in need of robust document management solutions.

Watermarking PDFs, adding content to PDFs, querying PDF documents, converting files into PDFs, turning PDFs into images, adjusting PDF colors, and creating PDF/A and PDF/X formats are just a few of the features available; additionally, you can compress, linearize, and flatten PDFs, as well as merge or split them, encrypt, decrypt, and restrict access to PDFs, extract text, perform OCR on PDFs, upload files, and zip them as needed. Our robust RESTful API is now fully operational, enabling you to efficiently develop your own products and solutions without the need to start from scratch, while providing you with comprehensive control over your backend infrastructure. With our private cloud service, you can oversee every aspect of the process, ensuring full management of your documents. The pdfRest API Toolkit can be quickly configured through the AWS Marketplace, allowing you to set up a self-hosted, production-ready server that integrates seamlessly with your services or automates your internal document workflows. We offer flexible pay-as-you-go pricing plans, catering to businesses that demand complete ownership of their backend systems with minimal or no external server interactions. Moreover, by creating an EC2 instance to host our API, you gain total ownership over all files stored on your server, thereby enhancing your operational security and efficiency. This approach empowers you to tailor your document management solutions exactly to your needs.

Elevate your projects by integrating advanced capabilities for editing, parsing, and rendering PDFs through an elite PDF library SDK. This adaptable multi-platform shared library, offered in formats such as dll, so, and dylib, provides a C-compatible interface that accommodates a range of programming languages like C#.Net, Python, Java 8, and C++ 11. The SDK boasts APIs tailored for various operating systems, including Linux, Windows, and Mac, and comes packed with a multitude of interface functions designed for creating and transforming PDF content, thus ensuring extensive customization options that cater to the specific needs of your project. It adeptly utilizes multi-core CPUs for efficient stream decoding and content rendering, while strictly adhering to the guidelines set forth by the portable document format specification. Users benefit from the ability to apply electronic signatures, with the flexibility to add or omit a cryptographic security layer based on their preferences. Furthermore, the SDK offers robust capabilities for PDF encryption and decryption, featuring a password-based encryption handler, as well as a comprehensive suite of tools for manipulating document structure—this includes creating, deleting, moving, inserting, extracting, resizing, and rotating pages. With these extensive features, this SDK ensures thorough management of all PDF-related tasks, establishing itself as an essential tool for developers looking to enhance their applications with superior PDF functionality. As a result, it empowers developers to create tailored solutions that meet diverse project demands while optimizing performance and security.