PaperPilot is an open toolkit offering PDF merging, splitting, compression and text extraction through a shared Rust core. It exposes CLI, MCP server, local API, desktop and WASM browser interfaces for document automation. The project says processing stays local or in browser memory. Version 0.6.0 is a prerelease, and web features including OCR and signature verification are marked Preview, so users should check support and output in the chosen interface before relying on a workflow.