Writing unmistakably human — Flesh Index

How Flesh Index works

Paste your text.
Drop in any piece of writing — from a sentence to a full article.
Flesh Index reads the language.
The writing tool analyzes patterns associated with human expression, including human markers, voice, tone, emotional texture, linguistic variation, personal imprint, and narrative movement.
Get your Flesh Score.
You receive a Flesh Score together with a breakdown of the human signals found in your text.

What does Flesh Index actually measure?

Human markers in text
Human voice
Voice and tone
Emotional texture
Personal imprint
Narrative drift
Linguistic variation

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

Don't make your writing less human to pass a detector.

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?

Flesh Index is a writing authenticity checker and humanity meter designed to identify the human imprint in language — the voice, texture, variation, emotional shifts, unexpected phrasing, and small irregularities that make writing feel personal and authentic. Your Flesh Score gives you a simple way to see how strongly those qualities come through.

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.

FAQ

What is Flesh Index?

Flesh Index is a textual humanity meter and writing authenticity tool that analyzes human presence in text. It looks at human markers, voice, tone, language, and other signals associated with authentic human expression.

What is a Flesh Score?

A Flesh Score is the human writing score generated by Flesh Index. It reflects the strength of human signals and personal expression detected in your text.

Is Flesh Index an AI detector?

No. AI detectors primarily look for patterns associated with machine-generated text. Flesh Index takes the opposite approach: it looks for human markers in text and measures human presence.

Can Flesh Index tell if my writing sounds human?

That's exactly what it is designed to help you explore. Flesh Index analyzes your text for signals associated with human voice, tone, variation, personal imprint, and authenticity.

Is Flesh Index a grammar checker?

No. Grammar and correctness are not the same thing as human expression. Flesh Index is designed to measure the human qualities of writing rather than simply correct the language.

Can I use Flesh Index on AI-generated writing?

Yes. You can analyze any text. Flesh Index will show you the human signals present in the writing, regardless of how the text was produced.

Can Flesh Index make AI text sound human?

Flesh Index does not rewrite your text. It shows you where human signals are strong or weak. What you do with that information is up to you.

Does Flesh Index rewrite my text?

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