Writing unmistakably human

Flesh Index — the textual humanity meter. It doesn’t detect AI slop. It detects YOU.

Paste any text and get a Flesh Score — a human writing score based on human markers in text, voice, tone, language, and other signals of authentic human expression.

No rewriting. No grammar correction. Just diagnosis.

How Flesh Index works

1 Paste your text. Drop in any piece of writing — from a sentence to a full article.

2 Flesh Index reads the language. The writing tool analyzes patterns associated with human expression, including human markers, voice, tone, and emotional texture.

3 Get your Flesh Score. You receive a breakdown of the human signals found in your text.

What does Flesh Index actually measure?

Expression Human markers, Human voice

Language Voice, tone, Emotional texture

Authenticity Personal imprint, Narrative drift

Variation Linguistic variation

"Don't make your writing less human to pass a detector. Measure what makes it human instead."

Most AI detectors try to answer one question: "Does this text look like it was written by AI?"

Flesh Index asks a different question: "How much human presence is actually in this text?"

A free tool to check if your writing sounds human

Paste your text into Flesh Index and see what your language reveals. Whether you're checking an essay, article, email, story, post, or AI-assisted draft, Flesh Index helps you understand the human voice in your text.

What is Flesh Index?

Flesh Index is a textual humanity meter and writing authenticity tool that analyzes human presence in text.

What is a Flesh Score?

A Flesh Score is the human writing score generated by Flesh Index.

Is Flesh Index an AI detector?

No. AI detectors look for machine patterns. Flesh Index looks for human markers in text.

Can I use Flesh Index on AI-generated writing?

Yes. You can analyze any text. Flesh Index will show you the human signals present.

Does Flesh Index rewrite my text?

No. It reads and scores your writing. Your words stay yours.