SynthGuard is a privacy-first humanizer for AI-generated images, videos, and text — running 100% in your browser. No uploads, no servers touching your media. A 10-layer pipeline rewrites digital fingerprints (PRNU, FFT, sensor noise, real EXIF, chroma subsampling, JPEG double-compression) in under 5 seconds. Includes a free AI detector with 8 forensic signals so you can verify before you publish. Built for creators and OFM operators who ship daily and can't afford their content leaking.