PDF Locker Free Online
PDF Locker adds strong password protection to any PDF document — directly in your browser, with no file upload required. Whether you are sending a marksheet to a university portal, sharing a certificate with an employer, or storing sensitive notes, a password ensures only authorised people can open the file. The tool uses standard 128-bit AES encryption recognised by all major PDF readers. Your PDF and password never leave your device — everything is encrypted locally inside the browser. Free for all students and professionals.
Free tools for students:
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PDF Merger ·
Background Remover ·
AI Study Assistant ·
GPA Calculator
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