Encrypt PDF
Set an open password for your PDF to prevent unauthorized access
or drag and drop files here
Please upload a PDF file
Instructions
- After setting the open password, the password is required to open the PDF
- Password protection is not a substitute for legal agreements; it is basic technical protection only
- All processing is done locally in your browser; passwords are never uploaded to any server
What you should know
PDF encryption adds two possible locks: an open password (needed to view the file) and a permissions password (which restricts printing, copying, or editing). For most users, an open password is enough to stop casual access.
- Use 8+ characters — short passwords can be cracked in seconds with freely available tools.
- Permissions are advisory — some PDF readers ignore print/copy restrictions, so do not rely on them for serious protection.
- Keep the password somewhere safe — we cannot recover it because the file never leaves your browser.
Read the full PDF encrypt guide →
This batch tool processes multiple PDFs at once, applying the same operation to every file you upload. It runs entirely in your browser — files are never sent to a server — and results are packaged for easy download.
- Upload multiple files — drag and drop a folder or select individual PDFs to process in one go.
- Same settings for all files — configure the operation once and it is applied uniformly across the batch.
- Results packaged for download — processed files are bundled into a ZIP archive for convenience.
About Encrypt PDF
PDFs often contain information that should not be freely readable: contracts, financial statements, medical records, or client proposals. Adding an open password stops anyone without the password from opening the file, which is enough protection for most casual sharing.
This tool uses an open password to encrypt the PDF. The encryption runs entirely in your browser using the pdf-lib library, so both the file and the password stay on your device. Choose a password with at least 8 characters mixing letters, numbers, and symbols.
Keep in mind that this tool uses a single password. Anyone who knows the password can view and edit the file. PDF permissions such as print or copy restrictions are advisory and may be ignored by some readers. For separate view and edit permissions, consider a desktop PDF editor.
If you later need to remove the password, use Decrypt PDF. For protecting many files with the same password, use Batch Encrypt PDF.