CloudConvert
Password protect and encrypt PDF files with strong AES-256 encryption online for free. Prevent unauthorized opening, copying, and printing.
or drop files here
Accepted formats: .pdf
Follow these simple visual instructions to convert and process your documents effortlessly.
Select the confidential PDF document you wish to encrypt with a password.
Type a strong password into the input box, re-enter it to confirm, and toggle visibility to verify.
Click "Protect PDF" to apply 256-bit AES encryption and save your password-protected file.
Powerful features engineered for speed, privacy, and flawless document conversion.
Industry-standard high security encryption prevents unauthorized access.
Double verification ensures no typos when setting your password.
We do not save or log your passwords; only you have the key to open your file.
Protected PDFs require passwords across all standard viewers (Acrobat, Chrome, Apple Preview).
Everything you need to know about using our online Protect PDF tool.
Need to perform other file modifications? Combine Protect PDF with our other free online processing tools.
Remove password protection, encryption, and permission restrictions from PDFs.
Draw, type, or upload your signature to visually sign PDF documents.
Permanently black out and delete sensitive text or confidential boxes from PDF.
Compare two PDFs side-by-side and highlight semantic text additions and deletions.
Combine multiple PDFs into one unified document in your preferred order.
Separate one page or a whole set for easy conversion into independent PDF files.
Delete unwanted pages from your PDF document in just a few clicks.
Sort, add, rotate, and delete PDF pages in any custom order.
Capture photo scans, apply edge detection, and convert to digital PDF.
Convert JPG, PNG, and WebP images into high-resolution PDF documents.
Convert Microsoft Word (DOCX/DOC) documents into pristine PDF format.
Convert PPT and PPTX presentations into easy-to-view PDF files.