Most humanizers work on the whole box at once. You paste five paragraphs, you get five new paragraphs back, and the three sentences you were actually happy with are gone along with the ones that needed work.
That is backwards. In a typical AI-assisted draft, most sentences are fine. The problem is a handful of them: the tidy summary line, the "it is important to note", the three-part list that every model reaches for. Those are the ones worth rewriting. Everything else is already yours.
Step one: see which sentences are the problem
Every sentence gets its own score. After you humanize, Grade A colours each one:
- Green reads as human.
- Yellow is borderline.
- Red still reads as machine-written.
If you only want the diagnosis, the free AI checker gives you the same sentence-by-sentence highlighting without rewriting anything. It needs no account and covers 300 words a day.
Step two: rewrite only the flagged ones
Press Go Green! and only the yellow and red sentences are sent back for a heavier rewrite. The green sentences are not re-written, re-ordered or "improved". They stay word for word.
Go Green keeps going on the flagged sentences until one of three things happens: they read as human, they stop getting better, or a safe limit is reached. That last one is on purpose. A sentence rewritten fifteen times stops sounding like anyone, so it stops before that.
What it protects
Rewriting a sentence should change how it reads, not what it says. Go Green will not introduce new names or numbers, and if a sentence cannot be rewritten faithfully it is left as it was rather than guessed at. Your US or UK spelling choice applies to Go Green exactly as it does to the first humanize.
What it costs
Nothing extra. Go Green is part of refining one humanization, so it does not count against your daily humanization limit and does not use your daily words. You already used those when you humanized the text.
It is on every plan. The Free plan gives you 150 words a day to humanize and 20 Go Green runs a day, with no card. Paid plans start at $9.99 a month.
What it does not do
It does not promise a detector result. The colours come from our own detector, so they tell you which sentences to look at, not how Turnitin, GPTZero or anyone else will score the text. No tool can honestly promise that, and we would rather tell you than sell you a number.
It also only runs on text the humanizer wrote. Paste something, run a check, and press Go Green, and it will ask you to humanize first. That keeps it doing the one job it is for: finishing a rewrite, sentence by sentence.
How it runs
- Paste your draftInto the humanizer, in US or UK spelling.
- Press HumanizeThe whole text is rewritten, staying close to what you wrote.
- Read the coloursGreen, yellow and red show which sentences still read as AI.
- Press Go Green!Only the yellow and red sentences are rewritten again. Green ones stay as they are.
A word about your institution
If the writing is for a class or an assessment, your school or university sets the rules on AI assistance, not us. Check the policy before you submit and follow it, including anything it asks you to disclose.
Questions people ask
Is there a tool that rewrites only the sentences that sound AI-written?
Yes. Grade A Humanizer colour-codes every sentence after it humanizes your text: green reads as human, yellow is borderline and red still reads as AI. Its Go Green button then rewrites only the yellow and red sentences and leaves the green ones exactly as they are.
Does Go Green use up my daily words?
No. Go Green is part of refining one humanization, so it does not count against your daily humanization limit or your daily words. The Free plan includes 20 Go Green runs a day, and every paid plan includes it too.
Can I just check my text without rewriting anything?
Yes. The free AI checker at ga-humanizer.com/ai-checker scores your text sentence by sentence and highlights the ones that read as machine-written. It needs no account and covers 300 words a day.
Will it change my facts, names or numbers?
It is built not to. It will not introduce new names or numbers, and if a sentence cannot be rewritten faithfully it is left unchanged rather than guessed at.
Does Go Green guarantee a detector score?
No. No tool can honestly promise how a given detector will score a piece of text. The colours are our own detector's reading, which makes them a guide to which sentences to look at, not a prediction of anyone else's verdict.