Every "humanizer" we tried for our own content was another LLM behind an API: you send your text away and get a new set of AI tells back.
So TextHumanize is plain algorithms. No model, no API key, the library runs fully offline, and the same seed gives the same result every time. It now works in 25 languages, as an open-source library, a web app and a free browser extension.
The hard part turned out not to be rewriting sentences. It was knowing which ones to leave alone.
What's the first thing that gives away AI writing for you?
TextHumanize is an open-source, algorithmic engine that humanizes AI-generated text using a 38-stage pipeline across 25+ languages — 100% offline and zero dependencies. Powered by PHANTOM™, ASH™, and SentenceValidator™, it reduces AI-like patterns, is deterministic with seed control, supports keyword preservation, and provides change reports/metrics for privacy-first, on-prem workflows.
