How I Encrypt PDFs in the Browser with Vue 3 and @pdfsmaller/pdf-encrypt-lite

Short summary

Build a client-side PDF encryption tool using Vue 3 and @pdfsmaller/pdf-encrypt-lite that keeps user files and passwords off servers. The tutorial explains the benefits (no upload limits, instant encryption, offline capability), covers password validation, file handling, and explains why AES-128 is better than legacy RC4 encryption. The author shares working code and a live implementation at en.sotool.top/encrypt/, complete with GitHub source.

• •Vue 3 + @pdfsmaller/pdf-encrypt-lite enables password-protected PDFs without server upload
• •Client-side encryption keeps user data and passwords fully offline
• •Tutorial includes password validation best practices and live tool with source code

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