The PDF Protector tool lets you add password protection to any PDF document so that only people with the correct password can open and read the file. Sensitive materials such as financial statements, medical records, legal contracts, employee files, and confidential business plans often need an additional layer of security beyond email or cloud storage. With this tool you can quickly lock a document before sending it to a colleague, client, or partner, giving both sides peace of mind that the contents cannot be viewed by unintended recipients. The protector runs entirely inside your browser, which means your documents are never uploaded to any remote server and your chosen password is never transmitted over the internet. This makes it ideal for anyone handling privileged information, from lawyers and accountants to HR professionals and freelance consultants. The resulting file is a standard, encrypted PDF that can be opened in any modern reader once the password is entered, so recipients do not need any special software. Adding a password also helps you comply with data protection expectations and internal security policies without needing expensive enterprise tools. Because everything happens locally, the process is instant even for large files, and you can protect as many documents as you like at no cost. With no signup, no watermarks, and no size limits, the PDF Protector delivers professional-grade document security through a friendly, streamlined interface.