Disclaimer
Important limitations of browser-based PDF processing.
Document fidelity
Browser conversions can differ from desktop software. OCR is not perfectly accurate, repair is best effort and large documents can exceed available browser memory.
Security-sensitive tools
Visual signatures do not automatically provide certificate-based identity verification. Cropping and whiteout are not secure redaction. Secure redaction intentionally rebuilds page appearance and can remove interactivity.
Standards and compliance
PDF/A compliance should not be inferred from metadata alone. Legal, archival or regulated use may require independent validation or specialized software.