Blackbar — destructive screenshot redaction for macOS

Why it surfaced

Blackbar makes a sharp security promise: redaction is destructive, not merely an overlay. Its page details 27 detectors for API keys, JWTs, hostnames, private keys, connection strings, and more, while emphasizing local processing, stripped metadata, and no network entitlement.

A $19 offline Mac app that detects secrets and identifiers in screenshots, then permanently burns the marked pixels into a fresh image.