What sanitization covers
Document sanitization removes information that should not ship with the final file. That includes visible text, hidden metadata, annotations, attachments, JavaScript, comments, and leftover editing artifacts.
The overlay problem
Drawing a black rectangle over text is not real redaction. The underlying text may still be searchable, selectable, or recoverable after conversion.
Critical rule
True redaction removes or destroys the underlying content. Visual hiding is presentation, not sanitization.
Release checklist
- Identify sensitive visible content.
- Apply real redaction, not visual overlays.
- Inspect and remove document metadata.
- Flatten the final output when needed.
- Open the final file and try to search for redacted terms.
- Keep originals and release copies clearly separated.
Metadata to review
- Author, title, subject, and keywords.
- Creation and modification timestamps.
- Producer application and version.
- Embedded files, annotations, comments, and layers.
Why local workflow matters
Sanitization often happens on the most sensitive files. A local-first route helps reduce exposure while the document is being prepared for release.