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EnglishHow PDFEncrypt Compares to Adobe Acrobat and Online PDF Encryption Tools
Updated
PDFEncrypt is a free, open-source Windows app that encrypts PDFs locally on your PC, so it fits best if you only need password protection and permissions and don't want to buy Acrobat or upload confidential files to a third-party server. Adobe Acrobat is the better choice if you also need full PDF editing, and online tools are the most convenient only when the document isn't sensitive and you accept uploading it.
The three options at a glance
| Dimension | PDFEncrypt | Adobe Acrobat | Online PDF encryption tools |
|---|---|---|---|
| Cost | Free, open source (AGPL) | Paid software (per site description) | Varies by tool |
| Where files are processed | Locally on your Windows PC | Locally on your device | Uploaded to a third-party server |
| Platform | Windows 7, 8, 10, 11 | Adobe's supported platforms | Any browser |
| Core capability | PDF encryption, passwords, permissions | Full PDF editing plus encryption | Usually encryption only |
| Extra features | Command line arguments, owner password, MSI (beta) | Full editing suite | Limited, tool-dependent |
| Source code | Available on GitHub | Proprietary | Usually not available |
Where PDFEncrypt wins
The site states PDFEncrypt encrypts any standard PDF for free "without the need to purchase the Adobe Acrobat software or upload your confidential PDF files to a third-party server." That single sentence captures its two advantages:
- No purchase required. You get standard PDF encryption algorithms without paying for Acrobat.
- No upload. The app runs directly on your Windows PC, so your document never leaves your machine. Online tools, by contrast, require you to send the file to someone else's server.
It also exposes options beyond a simple open password: you can set an owner password and apply permissions to the file, and the app supports command line arguments for scripted use. An MSI package (beta) exists for Windows Active Directory deployment, tested on Windows 10 x64 and Windows 11 x64, though it does not include the .NET framework.
Where Acrobat or online tools win
PDFEncrypt is an encryption utility, not a PDF editor. If your task involves editing content, converting formats, or the broader Acrobat toolset, PDFEncrypt won't cover it.
Online tools win on convenience: nothing to install, and they work from any browser. The trade-off is that your file is uploaded, which is exactly the scenario PDFEncrypt is designed to avoid.
A note on DRM
PDFEncrypt's own site addresses a common misconception: users often ask how to create PDFs that open without a password but can't be copied or printed. The site's article on DRM and PDFEncrypt explores whether the app is suitable for that goal. If your requirement is true access control rather than password-based encryption, read that article before assuming PDFEncrypt solves it.
How to decide
- Choose PDFEncrypt if you're on Windows, only need to password-protect PDFs and set permissions, and want the file to stay on your machine at no cost.
- Choose Adobe Acrobat if you need editing and other document features alongside encryption, and the cost is acceptable.
- Choose an online tool if the document isn't confidential, you don't want to install anything, and basic encryption is enough.
Getting PDFEncrypt
The latest version listed is 1.1.8462.22528, released in 2023. The site offers a standard installer, an installer without .NET Framework, a portable edition with no installer, and the source code. It's also available in the Microsoft Store. SHA1 checksums are published for each download so you can verify the files.