How to password protect a Word document
- Drop the Word (.docx) or PowerPoint (.pptx) files, up to 50 at once.
- Type the password twice.
- Click Protect and download the encrypted files.
Contracts, HR letters, exam papers, quotes sent by email: a password keeps a document closed to anyone who gets the file without being meant to. This tool applies the same encryption Word uses when you choose File › Info › Protect Document › Encrypt with Password, so the result behaves exactly like a file protected in Word: it asks for the password when opened, in Microsoft Word, PowerPoint, LibreOffice, Pages or Google Docs.
The encryption is AES-256 in Office's “agile” format. Without the password the content cannot be read or recovered, so write it down somewhere safe and send it to the recipient by a separate channel (a text message rather than the same email as the file).
The file name, formatting, pictures, comments and tracked changes are kept as they are; only the container is encrypted. If the document already has a password, remove it first with “Unlock Word document”, then protect it again with the new one.
Everything runs on our server in memory: files are deleted after 30 minutes and the password is never stored. Up to 50 files of 300 MB per run.
Frequently asked questions
Is this the same protection as in Microsoft Word?
Yes. It is the standard Office encryption (AES-256, agile format), so the file opens with the password in Word, PowerPoint, LibreOffice, Pages and Google Docs.
Can the password be recovered if I lose it?
No. Nobody can open the file without it, including us. Keep it somewhere safe.
Does it protect against editing or only opening?
This puts a password on opening. Once open, the document can be edited like any other. For a read-only recommendation, use Word's own Restrict Editing.
Can I protect several documents at once?
Yes, up to 50 files with the same password in one run; each keeps its own name.
Is it free and safe?
Free, no account. Files and passwords stay in memory on the server and are deleted after 30 minutes.