Protect / Unlock PDF

The Protect / Unlock PDF tool gives you two honest, browser-side operations built on what pdf-lib can actually do.

The Unlock mode loads a PDF — supplying the open password if you have one — and writes back a clean, unencrypted copy you can freely edit, print and copy from, which is the everyday fix when an old export carries owner restrictions that block harmless changes.

If the file needs a password to open, enter it and the tool rebuilds an unlocked version from the decrypted content.

The Mark ownership mode records an author/owner and a short usage note in the document metadata, producing a soft deterrent that travels with the file and shows up in document properties.

This is deliberately not dressed up as security: pdf-lib cannot apply real password encryption, so we do not pretend to.

A metadata mark discourages casual reuse and documents who owns the file, but it does not lock or encrypt it — for true confidentiality you would need a dedicated encryption tool.

Both modes run entirely in your browser with pdf-lib, so the document is never uploaded, and you always download a fresh copy while the original is left untouched.

Use Unlock to free up a restricted file you own, and Mark ownership to stamp authorship onto drafts and shared copies.

Only use these tools on PDFs you have the right to modify.