Best Protect PDF alternatives in 2026
Looking for a free protect pdf? Compare the top alternatives below. Quill Tools' Protect PDF is 100% free, processes everything in your browser, and requires no signup — see how it stacks up against popular competitors.
Protect PDF by Quill Tools
Add a password to a PDF with AES-256 encryption, and control printing, editing and copying. Encryption runs in your browser — the file is never uploaded.
3 alternatives compared
| Alternative | Pros | Cons |
|---|---|---|
01 Smallpdf ProtectAdds password protection to a PDF. |
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02 iLovePDF ProtectPassword protection within iLovePDF. |
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03 Adobe Acrobat ProtectAdobe's password protection tool. |
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Verdict
Why choose Quill Tools' Protect PDF?
Unlike most alternatives, Quill Tools processes everything directly in your browser. Your data never leaves your device — no uploads, no server-side processing, no tracking.
It's completely free with no usage limits, no account required, and no watermarks or restrictions. Just open the tool and start using it instantly.