Protect PDF
Lock a PDF with a password and AES-256 encryption.
Endless next steps.
Choose a PDF to protect with a password
Drop your files here to get started
Or start with a tool
54 tools availableA growing toolbox, with clear limits.
RAW and technical formats are on the roadmap. See exactly what is available today.
How to use Protect PDF
- Choose your file and wait for verification.
- Review the settings and create an export. Your original stays unchanged.
- Preview the result, read any export notes and download it through our direct download service.
Supported inputs and limits
Encrypt a copy with AES-256 so that it opens only with your password of 6 to 128 characters. A forgotten password cannot be recovered. The password is used only for this export and is deleted from our records when the job ends. Very old PDF readers cannot open AES-256 files.
Free use, with a shared allowance
No account is required. Uploads use a rolling 24-hour allowance of up to 4 GB and 50 files, whichever is reached first. New visitors receive a 2 GB allowance when all processing slots are occupied. Downloads do not consume this upload allowance. Read the fair-use policy.
Files are temporary. See how file deletion works, or browse all file tools.