PDF Pan Tool

The PDF Pan Tool models viewport navigation for a PDF document. It accepts a PDF source (URL or file), a page number, a current viewport size, and optional pan deltas to compute the new origin and zoom. It is designed for QA, document review, and automation engineers who need deterministic viewport positions without rendering.
Core logic computes new viewport origin by adding deltas to the current origin and clamps results to the document bounds. It outputs the updated origin and optional zoom, and can handle multi-page documents or exports for pipelines.
Benefits include reduced guesswork during scripted tests, reproducible viewport movements, and a lightweight calculation engine that integrates with other tooling. It is suitable for QA, automation, and product teams validating navigation flows.
Differentiators include explicit boundary handling, clear unit treatment (points for PDF pages, optional viewport units for screen rendering), and robust error signaling when inputs are missing or out of range. No content is extracted or rendered; the tool only computes viewport state for downstream use.