PDF lock
Upload a PDF, Word/Excel document, or image, choose a PIN, and get back a password-protected PDF. The PIN is generated on your screen — we never see or store it beyond the single request that locks your file.
How this works, and an honest limit
Word/Excel documents are converted to PDF first (the same engine behind Word to PDF); images become a one-page PDF right in your browser before upload. The PIN is then applied as a real PDF open-password (AES-128 encryption) — every common PDF reader will ask for it.
Honest limit: a small number of unusual, complex PDFs (heavy forms, certain scanners' output) can't be re-saved with a password by the engine this tool uses — you'll get a clear message instead of a broken file if that happens.
Is my file uploaded and stored?
Locking needs our EU-hosted server, but your file and the PIN only exist there for the moment it takes to process — deleted immediately after, succeed or fail. Nothing is stored, logged or inspected.
What if I forget the PIN?
We can't help — we don't store it, so there's no recovery. Note it down somewhere safe the moment it's generated.
Can I set my own PIN instead of generating one?
Yes — just type it directly into the PIN field instead of clicking Generate.
