PaperKnife

Why I built this Most PDF websites ask you to upload your sensitive documents—bank statements, IDs, contracts—to their servers. Even if they promise to delete them, your data still leaves your device and travels across the internet.

I built PaperKnife to solve this. It's a collection of tools that run entirely in your browser or on your phone. Your files never leave your memory, they aren't stored in any database, and no server ever sees them. It works 100% offline.

What it can do Modify: Merge multiple files, split pages, rotate, and rearrange. Optimize: Reduce file size with different quality presets. Secure: Encrypt files with passwords or remove them locally. Convert: Convert between PDF and images (JPG/PNG) or plain text. Sign: Add an electronic signature to your documents safely. Sanitize: Deep clean metadata (like Author or Producer) to keep your files anonymous.