PDF tools
Tools will load when you run.Password Protect PDF✓
Protect your PDF with AES-256 encryption and a password. The algorithm is selected automatically; no encryption settings are needed.
Your result.
How to use Password Protect PDF
- Choose your PDF.
- Choose the PDF and enter a strong password. Encryption uses AES with a 256-bit key.
- Download the encrypted PDF. A compatible PDF reader and the password are required to open it.
Process multiple files
Use a workflow to apply the same settings to each file.
Formats and requirements
- Input formats
- Output
- Availability
- Free in your browser and through the CLI
- Files per operation
- 1
- Browser file limit
- 128 MiB per file, 128 MiB total
What to expect
Page operations preserve content. Encryption permissions are advisory.
Do my files leave my device?
No. Thanks to advanced file-processing technology, your files are processed directly on your device, inside your browser. OneKit does not receive your input files or results. Required public processing libraries may download when you first use the tool.
File privacy and local processing →