PDF Tool for iPad

Purpose & User Intent: This tool provides PDF file manipulation on the iPad. Primary users are mobile professionals, students, and teams who need to prepare, compress, or securely distribute PDFs without a desktop. Use cases include preparing reports on the go, sharing contracts during travel, and annotating client briefs while offline.\nCore Logic & Features: Domain capabilities include in-browser PDF modification, preserving layout where possible, and producing a standalone output file per operation. Required features: merge, split, compress, rotate, extract pages, and password protection. Optional features: page range selection, batch presets, custom output naming, incremental saving, and simple lossless or lossy quality targets.\nInputs & Outputs: Inputs include pdf_file (PDF), operation (merge, split, compress, rotate, extract, password_protect), pages or page ranges, quality level, and optional password. Outputs include output_pdf, page_count, and new_file_size; results provide a downloadable file link and basic metadata such as modified_page_count.\nAlgorithms & Calculations: The tool selects the operation, applies modifications using a PDF processing core, maintains page order for merges, computes new file size after compression, and validates input PDF integrity.\nError & Edge Cases: Invalid or missing pdf_file, unsupported operation, encrypted PDFs without password, page ranges outside document bounds, or size limits; errors yield explicit codes.\nIndustry/Region & Localization: Uses standard page units (pages) and file sizes (MB); supports global character sets and does not rely on region-specific formats.\nAssumptions & Exclusions: Local or client-side processing is assumed; OCR and form-field editing beyond basic operations are out of scope; no cloud processing is assumed unless configured.