Protect PDF
Recompile PDF pages into a fresh document container to remove legacy permissions and re-index streams. Note: Browser-based pdf-lib tools do not apply hardware AES password encryption.
Drop your PDF here
or click to browse
Convert JPG, PNG, WEBP, remove backgrounds, upscale, and resize with instant client-side WebAssembly.
How to Use
- 1Upload your PDF document into the security workspace.
- 2Enter an administrative or reference password string into the field.
- 3Review the browser limitation note: This tool rebuilds the container but does not enforce cryptographic AES password protection.
- 4Click Protect PDF to copy all pages into a fresh document container using pdf-lib.
- 5Click Download to save the recompiled protected.pdf document.
Frequently Asked Questions
Does this tool provide cryptographic password encryption?
No. Because client-side pdf-lib lacks native AES encryption libraries, this tool rebuilds the document into a fresh container. For legally binding AES-256 encryption, use a specialized desktop utility like Adobe Acrobat or qpdf.
Why use this tool if encryption is limited?
It strips corrupted permission dictionary flags and recompiles page objects into a clean, standardized PDF container.
Are my documents transmitted to an external server?
No. All page copying and document generation execute entirely in your local browser memory with zero network uploads.