ezpdf editor

Purpose & User Intent: The ezpdf editor is a document manipulation tool designed to perform in-browser PDF editing without external apps. It targets professionals who modify, annotate, merge, split, and rearrange PDFs, or compress for distribution. Common users include legal reviewers, contract managers, educators, and administrative staff who need quick edits, redlines, or consolidated reports. The tool solves the problem of on-demand PDF edits when source files arrive in PDF form and rapid turnaround is required.\n\nCore Logic & Features: Required features include uploading a PDF with type and size validation; selecting an operation mode (edit text, annotate, merge, split, reorder, or compress); specifying page ranges and text replacements or annotations; and exporting the resulting PDF. Optional/advanced features include OCR for scanned documents, password-protected file handling, batch processing, watermarking, and PDF/A conformance. The tool preserves metadata where possible and returns a summary with the new page count and file size.\n\nInputs & Outputs: Inputs are: file (PDF, required), operation (enum: edit, annotate, merge, split, reorder, compress; required), page_range (e.g., 1-5; optional), text_replacements (list of {old, new}); optional, additional_pdfs for merge, compression_level (0-100). Outputs include edited_pdf, page_count, file_size, and a short processing_log. Validation ensures valid PDF, reasonable page ranges, and password correctness when protected.\n\nAlgorithms & Calculations: The tool uses standard PDF manipulation algorithms for page extraction, concatenation, reordering, and compression. Text edits attempt in-place replacement; OCR (if enabled) uses language settings. Merging and splitting rely on deterministic document assembly; metadata normalization is applied when possible.\n\nError & Edge Cases: Handles invalid or corrupted input gracefully by reporting invalid inputs, unmappable page ranges, or unsupported features. Missing passwords for protected documents prevent edits unless authorization is provided. Large files may require multi-step processing or batching.\n\nIndustry/Region & Localization: Supports Unicode text in all operations and language-specific OCR when enabled. Can produce compliant outputs such as PDF/A when requested; references relevant standards and region-specific formatting as applicable.\n\nAssumptions & Exclusions: Assumes user has rights to modify supplied PDFs. Excludes real-time collaboration, editing of locked form fields, or content removal beyond password-based restrictions without authorization.