AI Checker and AI Detector

Check AI writing with every flag explained. Unlimited, no sign-up.Check if your text flags as AI - free, instant.

Verdict will appear here

Writing style and tone analysis
Repetitive phrasing or structure patterns
Vocabulary diversity and word choice

AI model breakdown

HumanizeAI.pro provides writing-quality insights for clarity, tone, and readability. It must NOT be used for academic dishonesty, plagiarism, or misleading submissions.

What is an AI detector?

AI Detector by Humanize AI is a free AI checker that marks each passage of your text as AI-generated, mixed or human-written, and explains why. Each flag names its signal and quotes the sentence, while the report adds the closest AI model match and how 8 other detectors would likely score the text. Checks are unlimited, need no sign-up and work in 12 languages.

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0%AI GPT

AI-generated0%
Mixed0%
Human-written0%

Verdict will appear here

Writing style and tone analysis
Repetitive phrasing or structure patterns
Vocabulary diversity and word choice

Also checked with:+6

AI model breakdown

I had no idea how to start this essay, so I just typed whatever came to mind. It's messy, but it sounds like me.

I used AI to help sharpen my draft. The structure is cleaner now, but the core idea — that procrastination is fear, not laziness — is still mine.

Procrastination is defined by the voluntary delay of intended actions despite awareness of negative consequences. Research indicates it stems from emotional regulation difficulties rather than poor time management.

Analyzing your text...

I had no idea how to start this essay, so I just typed whatever came to mind. It's messy, but it sounds like me.

I used AI to help sharpen my draft. The structure is cleaner now, but the core idea — that procrastination is fear, not laziness — is still mine.

78 words

99%AI GPT

AI-generated99%
Mixed1%
Human-written0%

Appears AI-generatedHighlight in text

Average sentence length is long and uniform, aligning with AI patterns (AI 29.2 vs Human 23.2) in the excerpt where sentences run on with comparable length.Procrastination is defined by the voluntary delay of intended actions despite awareness of negative consequences.
Presence of a very long sentence fragment and extended clauses: AI-typical long structures appear, contributing to a higher proportion of lengthy sentences.I used AI to help sharpen my draft. The structure is cleaner now, but the core idea — that procrastination is fear, not laziness — is still mine.
Lower function-word ratio observed in AI writing signals (AI 0.33 vs human 0.402), reflected in the excerpt by heavier content-word usage across sentences.Research indicates it stems from emotional regulation difficulties rather than poor time management.
Longer mean word length and a higher fraction of long words (AI mean 5.86 vs human 5.24; long-words 0.307 vs 0.231) evident in the text through technical phrasing like 'voluntary delay' and 'emotional regulation'.
Limited self-repetition across the piece (3-gram repetition rate AI 1.4% vs human 3.5%), suggesting AI-like avoidance of repeated phrases within a short span.It's messy, but it sounds like me.
AI-skewed signal words / bigrams appear in close proximity to the provided text, such as 'Procrastination is defined' and 'voluntary delay' indicating formal, analytical diction often linked to AI-generated text.
Sentences begin with formal, non-personal framing in line with AI-starter tendencies, contributing to a measured, structured tone across the excerpt.I had no idea how to start this essay, so I just typed whatever came to mind.

Six jobs the AI checker handles for you

Check if your text reads as AI

The report marks every passage as AI-generated, mixed or human-written and explains each flag, with no daily limit or sign-up.

Detect text from the newest AI models

The report scores each major AI model separately, useful when drafts come from several writers or tools.

Get a result you can rely on

In internal testing on the MAGE-2 benchmark, the detector scored 97% accuracy. The report also shows how 8 popular detectors would likely score the same text.

Challenge a false positive

Every flag quotes the sentence and names the signal behind it. The note compares your figure for that signal, such as average sentence length, with typical AI and human writing.

Check text in 12 languages

Text in Spanish, German and 10 more languages is checked as written, with no translation step that could change the score.

Keep a record of every check

Each report exports as a PDF with the score, flags, notes, a timestamp and a report ID, ready to share with a teacher, editor or client.

How to check AI content

Paste your text or upload a file

Supported formats: .txt, .docx, .pdf and .md. To see an example report, click Try a sample.

Click Check for AI

Check AI writing with no sign-up. The report opens on the same page.

76%AI GPT

AI-generated99%
Mixed1%
Human-written0%

Appears AI-generatedHighlight in text

Average sentence length is long and uniform, aligning with AI patterns (AI 29.2 vs Human 23.2) in the excerpt where sentences run on with comparable length.Procrastination is defined by the voluntary delay of intended actions despite awareness of negative consequences.
Presence of a very long sentence fragment and extended clauses: AI-typical long structures appear, contributing to a higher proportion of lengthy sentences.I used AI to help sharpen my draft. The structure is cleaner now, but the core idea — that procrastination is fear, not laziness — is still mine.
Lower function-word ratio observed in AI writing signals (AI 0.33 vs human 0.402), reflected in the excerpt by heavier content-word usage across sentences.Research indicates it stems from emotional regulation difficulties rather than poor time management.
Longer mean word length and a higher fraction of long words (AI mean 5.86 vs human 5.24; long-words 0.307 vs 0.231) evident in the text through technical phrasing like 'voluntary delay' and 'emotional regulation'.
Limited self-repetition across the piece (3-gram repetition rate AI 1.4% vs human 3.5%), suggesting AI-like avoidance of repeated phrases within a short span.It's messy, but it sounds like me.
AI-skewed signal words / bigrams appear in close proximity to the provided text, such as 'Procrastination is defined' and 'voluntary delay' indicating formal, analytical diction often linked to AI-generated text.
Sentences begin with formal, non-personal framing in line with AI-starter tendencies, contributing to a measured, structured tone across the excerpt.I had no idea how to start this essay, so I just typed whatever came to mind.

Read your report

Start with the overall AI detection score, go through the highlighted segments, then check the 8-detector and AI model results.

99%AI GPT

AI-generated99%
Mixed1%
Human-written0%

Appears AI-generatedHighlight in text

Average sentence length is long and uniform, aligning with AI patterns (AI 29.2 vs Human 23.2) in the excerpt where sentences run on with comparable length.Procrastination is defined by the voluntary delay of intended actions despite awareness of negative consequences.
Presence of a very long sentence fragment and extended clauses: AI-typical long structures appear, contributing to a higher proportion of lengthy sentences.I used AI to help sharpen my draft. The structure is cleaner now, but the core idea — that procrastination is fear, not laziness — is still mine.
Lower function-word ratio observed in AI writing signals (AI 0.33 vs human 0.402), reflected in the excerpt by heavier content-word usage across sentences.Research indicates it stems from emotional regulation difficulties rather than poor time management.
Longer mean word length and a higher fraction of long words (AI mean 5.86 vs human 5.24; long-words 0.307 vs 0.231) evident in the text through technical phrasing like 'voluntary delay' and 'emotional regulation'.
Limited self-repetition across the piece (3-gram repetition rate AI 1.4% vs human 3.5%), suggesting AI-like avoidance of repeated phrases within a short span.It's messy, but it sounds like me.
AI-skewed signal words / bigrams appear in close proximity to the provided text, such as 'Procrastination is defined' and 'voluntary delay' indicating formal, analytical diction often linked to AI-generated text.
Sentences begin with formal, non-personal framing in line with AI-starter tendencies, contributing to a measured, structured tone across the excerpt.I had no idea how to start this essay, so I just typed whatever came to mind.

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PDF

Revise and export

Rewrite flagged sentences, run the AI scanner again to see what moved, and export the report as a PDF.

How to read your AI detection report

76%AI GPT

AI-generated
Mixed
Human-written

Appears AI-generated

Highlight in text

Average sentence length is long and uniform, aligning with AI patterns (AI 29.2 vs Human 23.2) in the excerpt where sentences run on with comparable length.Procrastination is defined by the voluntary delay of intended actions despite awareness of negative consequences.
Presence of a very long sentence fragment and extended clauses: AI-typical long structures appear, contributing to a higher proportion of lengthy sentences.I used AI to help sharpen my draft. The structure is cleaner now, but the core idea — that procrastination is fear, not laziness — is still mine.
Lower function-word ratio observed in AI writing signals (AI 0.33 vs human 0.402), reflected in the excerpt by heavier content-word usage across sentences.Research indicates it stems from emotional regulation difficulties rather than poor time management.
Longer mean word length and a higher fraction of long words (AI mean 5.86 vs human 5.24; long-words 0.307 vs 0.231) evident in the text through technical phrasing like 'voluntary delay' and 'emotional regulation'.
Limited self-repetition across the piece (3-gram repetition rate AI 1.4% vs human 3.5%), suggesting AI-like avoidance of repeated phrases within a short span.It's messy, but it sounds like me.
AI-skewed signal words / bigrams appear in close proximity to the provided text, such as 'Procrastination is defined' and 'voluntary delay' indicating formal, analytical diction often linked to AI-generated text.
Sentences begin with formal, non-personal framing in line with AI-starter tendencies, contributing to a measured, structured tone across the excerpt.I had no idea how to start this essay, so I just typed whatever came to mind.

Also checked with:+6

AI model breakdown

76%AI GPT

Appears AI-generated

AI-generated
Mixed
Human-written

AI-generated
Mixed
Human-written

Highlight in text

Average sentence length is long and uniform, aligning with AI patterns (AI 29.2 vs Human 23.2) in the excerpt where sentences run on with comparable length.Procrastination is defined by the voluntary delay of intended actions despite awareness of negative consequences.

Also checked with:+6

AI model breakdown

1 of 8

What does the AI GPT score mean?

The percentage on the gauge is the AI detector's confidence that AI wrote the text. A higher number means stronger AI signals. It isn't the share of the text that AI wrote: the breakdown next to it shows that.

The signals our AI writing detector checks

Example essay80 wordsAppears AI-generated

It is important to note that 3 time management plays a crucial role in academic success. Students who plan their schedules effectively are able to complete their assignments with greater efficiency.1 Students who track their deadlines carefully are able to maintain steady progress across the semester 1 Steady progress across the semester 4 helps students reduce stress, improve focus, achieve better grades. Moreover, 2 the utilization of structured planning methodologies facilitates enhanced productivity5 In conclusion, time management plays a crucial role in academic success.6

1Sentence rhythm
Long sentences of similar length in a row
2Stock transitions
“Furthermore”, “Moreover”, “It is worth noting”
3Impersonal subjects
“It is important to…” instead of “you” or “we”
4Repetition
Repeats words from the previous sentence
5Word choice
Formal, longer words where short ones work
6Punctuation
Few questions, asides or varied punctuation

Use the AI text detector for your writing task

Student
Check your own essay for false positives before you submit it.
AI essay checker
Teacher
Find passages and reasons to discuss with a student, not just a score.
AI detector for teachers
Content writer or freelancer
Run client drafts through the AI content detector and catch templated passages before an editor does.
ESL writer
See whether formal phrasing is being read as AI, and which sentences to loosen up.
Researcher
Spot generic sections in papers and abstracts before review.
SEO or content manager
Check every draft from writers and AI-assisted workflows before it goes live.

How the AI detector has helped our users

The free AI detection feature is great !!
Free to useSep, 2026
As a student researcher I can't afford premium plag and AI detection tool. Humanize AI helps in this regard a great deal.
Spots AI textSep, 2026
This app has been great to use. It's simple, fast, and works as I expected most of the time. The interface is easy to understand, and I faced very minimal issues particularly by AI detection. I would definitely recommend this app to others.
Flags the exact phrasesSep, 2026
It is a great tool for checking and rephrasing AI content.
Detail you can act onSep, 2026

Beyond the AI checker

Once you know what to revise, pick the tool for the next step.

Start your next AI check here

See which sentences read as AI. Free whenever you need it.

Frequently asked questions

Is this AI detector free?

Yes. You can use the AI checker free and check AI content without limits or an account. Every report includes the highlights, the notes behind each flag, likely scores from 8 other detectors, the AI model breakdown and a PDF export.

What is the best free AI detector?

The best free AI detector is one that shows its work, not just a number. Look for sentence-level highlights, a reason for every flag and a way to compare results across detectors. This AI checker gives you all three.

Can AI detection be wrong?

Yes. Every AI detector tool can flag human writing as AI or miss AI text, so treat the score as a signal, not proof. Read the notes behind each flag and compare the likely scores from the 8 other detectors before you decide anything. If you think a result is wrong, email [email protected] with the report ID for a manual review.

Why is my own writing detected as AI?

Formal and academic writing shares many patterns with AI text, so careful human writing can score high. Open the highlighted segments to see which pattern drove each flag, then decide whether it needs changing.

Is a 20% AI detection score bad?

Not on its own. The overall score is the likelihood that your text matches AI patterns, not the share of it that AI wrote. For the share, look at the AI-generated, mixed and human-written breakdown, and read the highlighted segments before you change anything.

What AI detector do colleges use?

It depends on the school. The detectors colleges use most are among the 8 the report compares, so you can see how each is likely to read your text. For college coursework, there's also an AI detector for college.

Which languages does the AI detector support?

English, Spanish, French, Portuguese, German, Italian, Polish, Indonesian, Ukrainian, Traditional Chinese, Arabic and Dutch.

AI Checker and AI Detector

What is an AI detector?

Six jobs the AI checker handles for you

Check if your text reads as AI

Detect text from the newest AI models

Get a result you can rely on

Challenge a false positive

Check text in 12 languages

Keep a record of every check

How to check AI content

Paste your text or upload a file

Click Check for AI

Read your report

Revise and export

How to read your AI detection report

What does the AI GPT score mean?

The signals our AI writing detector checks

1Sentence rhythm

2Stock transitions

3Impersonal subjects

4Repetition

5Word choice

6Punctuation

Use the AI text detector for your writing task

How the AI detector has helped our users

Beyond the AI checker

Start your next AI check here

Frequently asked questions

Is this AI detector free?

What is the best free AI detector?

Can AI detection be wrong?

Why is my own writing detected as AI?

Is a 20% AI detection score bad?

What AI detector do colleges use?

Which languages does the AI detector support?