Humanize AI text.
Detect it with confidence.

Zyrstar's in-house AI Humanizer and AI Detection Engine work together — rewrite AI-flavored writing into natural prose, and measure exactly how AI-generated any text is.

Features

Proprietary AI Humanizer

Rewrites AI-flavored phrasing, varies sentence rhythm, and adjusts tone — while preserving your original meaning.

Proprietary AI Detection Engine

Analyzes perplexity, burstiness, semantic similarity, structure variation, vocabulary diversity, repetition, and coherence — all in-house, no third-party APIs.

Transparent scoring

See your Zyrstar Humanization Score and AI Detection Score with a full metric-by-metric breakdown, not just a black-box number.

Built for speed

A lightweight, CPU-only architecture means fast analysis without sacrificing accuracy or requiring GPU infrastructure.