SnapShield AI

SnapShield AI is a privacy-first annotation and redaction editor for Windows. Blur faces, redact sensitive data, annotate anything — entirely on your device. No mandatory cloud, no subscription. Optionally share via your own Google Drive. Screenshots of the real Windows build — every redaction below was produced by the feature it illustrates, on-device, with nothing uploaded. A Gaussian blur is a linear convolution — the original signal is still present in the output and can be mathematically recovered. SnapShield AI averages source pixels into blocks before any smoothing, so the information is genuinely gone. Block size scales with the content being covered, and solid covers are fully opaque. Verified by pixel-level tests that measure the exported image, not by code comments.