Lock PDF
The pre-send ritual for sensitive attachments: lock the PDF with a password, send the file, share the password separately. Thirty seconds that de-fangs a misdirected email. Free with fair daily limits.
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Drag & drop your file here
or click to browse · Up to 15 MB
Select fileAccepted: PDF
Your files are processed temporarily and deleted automatically — there is no general cloud storage. File deletion.
How to protect pdf
Simple steps — no software to install.
- 1
Upload the PDF
The sensitive attachment-to-be.
- 2
Set the password
Strong, and recorded.
- 3
Send locked
Password by another channel.
Why use our Protect PDF
Secure & private
Files are encrypted in transit and deleted automatically after processing.
Fast results
Optimized processing returns your file in seconds.
Free to start
Core tools are free with daily limits — no install required.
Works anywhere
Runs in your browser on any device, anywhere in the world.
Locking as a habit
The documents worth locking are obvious in the moment — salary letters, IDs, agreements, medical papers. Making the lock a reflex before attaching means the inevitable wrong-recipient email someday delivers only noise.
The quick mechanics
Upload, password, download — the locked copy encrypts fully (locking IS encryption). We never see or store the password; keep your own record and an unlocked original archived. Files are processed temporarily and deleted automatically — there is no general cloud storage.
- 30-second pre-send lock
- Full encryption underneath
- Misdirection insurance
- Free with fair daily limits
- Files auto-deleted