The automatic version of this tool is coming to FinSafe web. The steps below work today.
Until then, this page gives you honest, working ways to add a password using software you almost certainly already have. No third-party website required — your contract stays on your own device.
How it works
- On a Mac: open the PDF in Preview, choose File, then Export, tick Encrypt, set a password, and save the protected copy.
- On Windows: open the PDF in Microsoft Word (it converts on opening), choose Save As with PDF as the type, open Options, and tick Encrypt the document with a password.
- With LibreOffice (free, any platform): open the file, choose Export as PDF, go to the Security tab, and set an open password.
- Test the protected copy by opening it — you should be asked for the password — then share it and send the password through a different channel, such as a phone call.
Your privacy
This page is guidance only — you do not hand any file to FinSafe to use it, and every step runs in software on your own device.
When the automatic version launches on FinSafe web, it will encrypt files directly in your browser, so they will never leave your device.
Avoid third-party websites that ask you to send them a contract just to add a password — the document contains personal data worth keeping local.
Common use cases
- Lock a signed loan agreement before emailing it to the other party.
- Protect a contract stored in a shared family or office folder.
- Add a password to a document bundle before putting it in cloud storage.
- Keep sensitive ID details in an agreement away from casual viewers of a shared device.
Limitations
- The automatic in-browser version is still in development; this page is guidance only.
- PDF password strength depends on the software and settings used — a short guessable password protects very little.
- If you forget the password, the file may be unrecoverable, so store the password somewhere safe.
- Password protection controls opening the file; it does not stop someone you gave the password to from sharing it.
Frequently asked questions
When will the in-browser Protect PDF tool be available?
It is in development for FinSafe web. Like FinSafe's other tools it will process files entirely in your browser. Until it ships, the methods on this page work today with software you already have.
Is a password-protected PDF really secure?
Modern PDF encryption with a strong password is solid protection for everyday purposes. The weak point is usually the password itself — pick a long one that is not guessable, and never send it in the same email as the file.
Which method should I use if I have no paid software?
On a Mac, Preview is built in and does the job. On Windows, Microsoft Word can do it, and LibreOffice is a free download that works on any platform and handles PDF passwords well.
What happens if I forget the password?
You may permanently lose access — that is the point of encryption. Keep the password in a password manager or another safe place, and keep an unprotected copy somewhere genuinely secure if losing access would be a problem.
Should I password-protect every agreement?
Not necessarily. Protect files you are about to send or store somewhere shared. For documents that stay on a device only you can unlock, the device's own security may already be enough.