Failed redaction detection
Find text that was covered, not removed — before it leaks.
What it checks
- Opaque vector boxes painted over extractable text (CTM-aware, paint-order-aware)
- Images placed over text, classified opaque / transparent / ambiguous via their transparency data (an ambiguous overlay reports not-evaluable instead of guessing)
- Partial-line coverage: a box over the middle of a line is caught via full glyph-band extents, not just the run origin
FAQ
Why do redactions fail?
Because drawing a black box does not delete the text under it. Copy-paste, text extraction, or a screen reader recovers it instantly. Real redaction removes the content.
Does Preflight redact for me?
No — it detects failures so you can re-redact in a tool that actually removes content. Detection and remediation staying separate is what keeps the report trustworthy.
What happens to my documents?
Uploads are tenant-scoped, encrypted at rest, and anonymous uploads auto-purge within 24 hours. Result pages are token-gated and never indexed.