# Humanize AI writing

Make it sound human. Better: make it sound like you.

AI drafts all share the same tells. Uniform sentence length. Symmetrical hedging, the "not just X but Y" kind. Stock phrases like "delve" and "it's worth noting" that no actual person says out loud. Em dashes everywhere, doing the work three different punctuation marks should be doing instead.

These aren't vibes. They're measurable patterns. And once you know what to look for, you can't unsee them, in your own writing or anyone else's.

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Most humanizers play a losing game

Paraphrase the sentence. Swap a few words. Hope the detector says "human" this time.

That's not fixing your writing. That's gaming a scoreboard nobody agreed to trust in the first place. Detectors are unreliable in both directions; they flag human writing as AI and wave AI writing through constantly. We keep every published accuracy figure, with sources and dates, at scriptgrain.com/reference/ai-detector-accuracy, and it does not make comfortable reading for anyone treating a detector score as a verdict.

So we built something else.

What ScriptGrain's humanizer actually does

1. It measures the signals.

Sentence-length variance, clause structure, hedging patterns, word repetition, punctuation habits. The stylometric fingerprint that makes writing read as machine-generated in the first place. Not guesswork, measurement.

2. It rewrites toward natural variation.

Short sentences next to long ones. Fragments where a fragment lands better than a full clause. The rhythm real writing has and AI drafts don't. The facts and the meaning stay; the shape of the sentences changes.

3. It scores before and after.

Up to three measured passes, each one rescored. No black box. You see the before, the after, and the difference.

A real run, not a mock-up

We fed the humanizer a typical AI announcement paragraph: the thrilled-to-announce kind, complete with "streamline your workflow", "moreover", "it's worth noting" and a journey we would all continue on together. Its opening line even carried the obligatory em dash. The input scored 0.15 on the human side of the scale. Three passes later, the output read:

We just launched a new scheduling feature. It's overdue. Workflows get messy fast when people are juggling five different calendars. The interface is simple to pick up; you won't need a tutorial to find your way around.

A handful of users kept telling us the same thing: they were burning time lining up calendars before anyone could actually get to work. That's what shaped this. Hopefully it cuts down on the back-and-forth. More updates coming soon.

Final score: 0.78. And here's the honest bit: the default target is 0.85, this run fell short of it, and the tool reports that instead of rounding up. A humanizer you can trust is one that admits when a pass didn't get there.

Humanize toward your voice

"Human" isn't one baseline. Your writing has its own comma density, its own rhythm, its own favourite words, and a generic humanizer flattens all of that into nobody in particular.

ScriptGrain can build a voice profile from writing you've already done: 45 measured reference points. With a profile in place, the polish loop revises drafts toward your measured voice, and every result carries a voice-match score against it. If you use both, run polish first and the humanizer last, then check the free voice-match score to confirm the result still sounds like you.

We don't sell detector evasion

Worth saying plainly. Detectors are unreliable tools being used for high-stakes decisions, and beating one isn't the same as writing something good. The goal here is writing your readers actually trust: prose that sounds like a person made decisions, because one did, and a measurement to back it up.

Check any text free first

Run your text through the free stylometric AI-writing check at scriptgrain.com/ai-detect: a human-vs-AI confidence score plus the per-signal breakdown showing exactly which habits read as machine-written. Creating a free account shows your result, no card needed. There's also a free in-browser style analysis at scriptgrain.com/tools/writing-style-analysis that uploads nothing at all.

Humanizing costs one generation credit on any paid plan, from £12/month, and if your text already reads as human it returns free without charging you.

Questions

What does humanizing actually change?

The measurable signals that read as machine-written: uniform sentence lengths, symmetrical hedging, stock phrases, repetitive connectives and punctuation habits. The rewrite preserves the meaning and structure while varying the rhythm, and every pass is rescored so you can see the movement, up to three passes per run.

Will it make my writing pass AI detectors?

That is not the promise, and we would rather be straight about it. Detectors are unreliable in both directions; we collect every published accuracy figure at scriptgrain.com/reference/ai-detector-accuracy. ScriptGrain reports a real before and after score, including when a run falls short of the target, and the goal is writing your readers trust rather than a detector verdict.

Can it humanize toward my own voice rather than generic human?

Yes, and that is the point of the product. Build a free voice profile from writing you have already done, then use the polish loop to revise drafts toward your measured voice. Run polish first and the humanizer last, and verify with the free voice-match check.

How much does it cost?

One generation credit per run, and a run includes up to three internal rewrite-and-rescore passes. If your text already clears the target it returns free. Credits come with any paid plan, from £12/month, and there is a free tier for seeing your own voice profile first.

Related

ScriptGrain · Why ScriptGrain · Sample voice profiles · The Journal · Support