Protect PDF
Add a password to encrypt your PDF and keep it safe.
Select or drop your file
PDF files — add several to process in one batch
Batch: up to 5 files at once · Premium for 100
Processed locally in your browser — nothing is uploaded.
A password turns a PDF from something anyone can open into something only the right people can read. Protect PDF encrypts your document so it can't be opened without the password you set — the right move before emailing a payslip, a contract or anything you wouldn't want read if the file went astray. Encryption is applied in your browser, so the unprotected file never leaves your device.
How to protect pdf
- 1. Upload the PDF you want to secure.
- 2. Set a strong password — you'll share it with recipients separately.
- 3. Click Protect PDF and download the encrypted file.
When to use Protect PDF
Email sensitive documents
Encrypt a payslip, medical letter or contract so that even if the email is misdirected, the attachment can't be opened.
Share financial records
Add a password to bank statements or invoices before sending them to an accountant or client.
Protect personal files
Lock a document containing personal details so it's safe to store or transfer.
Choose and share the password carefully
The protection is only as strong as the password — use something long and hard to guess, not a birthday. Just as important, send the password through a different channel than the file itself: if the PDF goes by email, share the password by message or in person. And keep your own note of it, because a password-protected PDF can't be recovered if you forget it.
Frequently asked questions
What kind of protection is applied?
The PDF is encrypted so it can't be opened at all without the password you set.
What happens if I forget the password?
There's no back door — a forgotten password means the file can't be opened. Keep a secure record of it.
How should I share the password?
Send it separately from the file, ideally through a different channel, so the two never travel together.
Is the original file uploaded?
No. Encryption is performed in your browser, so the unprotected document never leaves your device.