secure
Protect PDF
Add password protection to a PDF before sharing sensitive information. The encryption workflow runs locally when supported, so your document stays private.
Add AES-256 password protection locally in your browser. Your PDF never uploads.
About Protect PDF
A private way to password protect pdf online
Lock a PDF with a strong password. Encryption happens on your device, so we never see your files.
Local
Runs entirely on your device.
Free
No account, no watermarks.
Fast
Native-speed processing.
How to use Protect PDF
- Choose the PDF you want to protect.
- Enter a strong password and confirm it.
- Encrypt the file and download the protected PDF.
Why use iChoosePDF
- Adds a practical layer of access control before sharing.
- Works well for invoices, contracts, forms, and personal records.
- Keeps the password workflow simple and private.
Common use cases
- Contracts
- Financial documents
- HR files
- Client records
Tips for better results
- Use a unique password that is not easy to guess.
- Share the password through a separate channel from the PDF.
- Store the password safely because it cannot be recovered from the protected file.
Troubleshooting
- If a recipient cannot open the PDF, confirm they typed the exact password.
- If you forget the password, create a new protected copy from the original file.
Privacy and security
iChoosePDF is built around browser-first PDF processing. When a tool can complete a task locally, the document stays on your device and does not need to be uploaded just to finish the job.
For sensitive files, review the output before sharing, use strong passwords where appropriate, and keep an original copy of important documents.
FAQs
Can iChoosePDF recover a forgotten PDF password?
No. For privacy and security, the password is not stored by iChoosePDF. Keep a safe copy of it.
Should I send the password with the PDF?
It is better to send the password through a different channel, such as a separate message or phone call.
Is iChoosePDF free to use?
Yes. The core PDF tools are free to use in your browser, with no account required for ordinary document tasks.
Are my files uploaded to a server?
iChoosePDF is designed for browser-first processing. When a tool can complete the job locally, your files stay on your device instead of being uploaded.
Can I use this on mobile?
Yes, the tools work in modern mobile browsers. Larger PDFs are usually easier to manage on a desktop or laptop because they need more memory and screen space.