PDF Validator

Purpose & User Intent: The PDF Validator Tool analyzes uploaded PDFs to verify structural integrity, metadata correctness, and conformance to common standards. Target users include QA engineers, publishers, developers, content teams, and compliance professionals who need fast, repeatable validation integrated into workflows. Use it when preparing PDFs for distribution, archival, accessibility checks, or regulatory audits to reduce rework and ensure reliable document quality.
Core Logic & Features: The tool employs a rules-based validation engine aligned with ISO PDF specifications. Required features include binary file input and a generated report; optional/advanced features add PDF/A conformance checks, batch processing, custom validation profiles, and structured exports (JSON or CSV). It flags missing metadata, embedded fonts, improper color spaces, encryption status, and problematic cross-reference and page-tree structures.
Inputs & Outputs: Inputs include a PDF file (required), an optional validation_profile, pdfa_mode flag, metadata_check toggle, and a maximum file size. Outputs include a detailed report, a pass/fail indicator, and a concise summary. Reports can be downloaded or consumed by automation pipelines; outputs are designed for integration with CI, QA dashboards, or content-ops tooling.
Algorithms & Calculations: The validation logic is deterministic, applying per-rule checks rather than numeric scoring. It assesses version compatibility, linearization status, encryption presence, font embedding quality, color space consistency, and metadata presence. When PDF/A conformance is requested, it validates required conformance levels and accessibility-related criteria, returning structured results and optional scoring.
Error & Edge Cases: Handles corrupted or truncated files by reporting parse errors and aborting specific checks; rejects non-PDF inputs or missing files; password-protected PDFs trigger a separate advisory when password access is unavailable; large batch processing may time out; clearly documents any encountered issues.