Protect a financial statement
Add a password before emailing bank statements, tax returns, or invoices.
Protect PDF
Add a password to a PDF so it can only be opened by people who know it. Useful for sending sensitive documents over email or storing confidential files in shared cloud folders.
How to use Protect PDF
- Upload your file using the secure uploader.
- Choose any available conversion options, such as page size, margins, quality or language.
- Start the conversion and download the finished file when it is ready.
Common use cases
Secure HR or legal documents
Contracts, NDAs, and personnel files should not be readable by anyone who finds the email.
Share over a public channel
Posting a PDF link in a chat? A password keeps it private even if the link leaks.
Limitations
Conversion results can vary depending on the structure, quality and complexity of the source file.
Privacy and security
Files are transferred over HTTPS, processed only for the requested conversion and automatically deleted within 30 minutes. FlowToPDF does not require an account and does not use uploaded files for training or manual review.
Frequently asked questions
What kind of password protection is used?
A standard PDF user password (RC4-128). Most PDF readers will prompt for it on open.
What if I forget the password?
There is no recovery. Pick a password you can remember or store it in a password manager.
Can I remove the password later?
Yes — use our Unlock PDF tool with the correct password to remove it.
Is the password sent to your servers?
It is used in-memory to encrypt the PDF and is then discarded. We never store passwords.
Related PDF tools
Convert your file
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