Review the whole passage
Start with the overall estimate, then read the complete argument before changing a sentence.
Check your text for AI writing signals
Paste an English passage to see a detector estimate and sentence feedback when available. Read the result in context, then decide whether the writing needs an edit.
English drafts · At least 50 words per request · 500 words/day without an account, shared across both tools. Free account: 2,000 shared words/day.
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Try before you register
500 shared words per day as a guest. Free accounts get 2,000.
Bring your own document
Import text-based PDF, DOCX, or TXT files up to 10 MB.
Read the result with your text
An overall estimate, with sentence feedback when available.
Read the result
One estimate. A closer look at each sentence.
An illustration of how to read a result, not a measured accuracy claim.
Illustrative resultMixed signals
The project aims to improve efficiency across several areas.
On Tuesday, we tested the new handoff with the support team.
Highlighted: a sentence to review in context. A label is not proof of AI authorship.
Read beyond the headline score.
The overall estimate is the starting point. Read the sentence labels alongside the full passage and its supporting sources.
- Overall AI and human estimates
- Sentence feedback when returned by the service
- A direct path to revising your draft
A detector estimate is a review signal, not proof of who wrote the text.
A starting point for a closer review
Use the score alongside your document, sources, and writing history.
Inspect sentence feedback
Some responses include sentence labels. Use them as prompts to read more closely, not as evidence of misconduct.
Know what is not checked
The detector does not verify facts, compare against a plagiarism database, or confirm a citation.
Keep editing within reach
Send the passage to the humanizer, compare the wording, and edit the result yourself.
Check the passage, then read the evidence
Use the estimate to ask better questions about a draft.
Add enough context
Paste at least 50 English words. Include the surrounding argument rather than checking a short sentence on its own.
Paste text or import a document
Read the estimate
Review the overall score and any sentence feedback returned by the service. A high score is not a record of authorship.
Sentence feedback when available
Choose a useful next step
Check sources and draft history. If the wording needs work, send the passage to the humanizer and compare the revision.
One click to the rewriting workspace
Understand what the score can tell you
AI detection estimates patterns in writing. It can produce false positives and false negatives. No independent accuracy benchmark is published here.
Read our responsible-use guidanceAI detection checks writing signals
Use the estimate to guide a closer review. It cannot identify the author or reliably name the model that wrote a passage.
Plagiarism checks source overlap
A plagiarism checker compares text against sources. This detector does not perform that comparison or verify originality and citations.
Make your next draft easier to read.
Start with an English email or report. Compare the rewrite, edit the details, and copy the version you choose.
AI detector questions, answered
About models, accuracy, privacy, and your next edit.
Read the privacy policyCan this detect writing from ChatGPT, Claude, or Gemini?
You can check English text from any source. The service estimates writing patterns; it does not reliably identify a specific model. No independent model-by-model accuracy benchmark is published for NoteCleaner.
Does a high AI score prove someone used AI?
No. Both false positives and false negatives are possible. A score is not proof of authorship or misconduct. Read the sources, context, and draft history, and follow the rules that apply to the document.
Where does submitted text go?
Text passes through the application server to an external AI service. The service used may change when a fallback is needed. Signed-in requests save input and output in account history for up to 30 days; you can delete saved documents. Deletion from NoteCleaner does not establish deletion by an external provider. See the privacy policy before submitting sensitive material.
Is the AI detector also a plagiarism checker?
No. It does not search a source database, verify citations, or establish originality. An AI score and a plagiarism finding answer different questions.
How are checks counted against my allowance?
Each successful request counts its input words. Guests have 500 shared words/day; Free accounts have 2,000 shared words/day. A 200-word rewrite followed by a 200-word check uses 400 words. Paid plans have separate humanizer and detector allowances.
Why might sentence feedback be missing?
The connected service does not return sentence data for every response. You may receive an overall estimate without sentence labels. The absence of a highlight does not establish that a sentence was written by a person.