Straight answers about what ScribeLens measures, what it costs, and how to read the sentence-level evidence behind every result.
Paste text or upload a PDF, DOCX, TXT, or Markdown file. Extraction happens in your browser, and a document is analysed in one pass, with no chunking.
You do not need an account to try it: a guest check covers up to 2,000 words per scan and 3,500 words per day. A free account scans whole papers in one go, within a 35,000-word monthly allowance, and includes 9 PDF/DOCX report exports a month.
Every sentence is classified human-like, mixed, or AI-like, and highlighted in the document. The overall verdict is graded rather than a single percentage: it distinguishes likely human-written, mixed signals, a blend of human and AI writing, substantial AI involvement, and strong AI-like signals.
The headline always agrees with the percentages printed beside it. If most sentences read human, the verdict says so — even when document-level style patterns lean the other way, in which case the report explains the disagreement instead of hiding it.
Reference lists and bibliographies are detected and excluded automatically before scoring, along with in-text citation apparatus, DOI and ISSN lines, copyright and licence text, journal running headers, and declaration sections such as Author Contributions, Funding, Conflicts of Interest, Data Availability, and Ethics statements.
This matters because citation formatting is the most formulaic text in any paper by construction, and scoring it inflates AI-like signals on genuine scholarship. You do not need to prepare the document — paste or upload the whole paper.
Every scan classifies each sentence as human-like, mixed, or AI-like, highlights it in your document, and names the pattern behind every flag with reason keywords. With a free account you can export the report as PDF or DOCX, with 9 exports a month.
Yes. Reports export to PDF and DOCX, and the PDF includes a built-in guide so a third party can interpret it without an account. You can also generate a verification link: the report gets a scan ID that resolves to the authentic stored copy, so a printed PDF can be checked for tampering.
Yes, with Pro. Batch upload checks up to 30 PDF, DOCX or TXT files in one go, with a full report for each and a CSV of the results. Teachers can save each set as a class assignment in My classes and see a class summary later.
Yes, and it's optional. Choose Add AI disclosure on your report and say which AI tools you used and what for, or that you used none. It appears at the end of the report as your own statement, marked as not verified by ScribeLens, and it doesn't change the analysis.
Yes, if you turn on My recent scans. It keeps your last 25 scans in your own browser, so you can open a report again without scanning again. Nothing is sent to ScribeLens for this, and you can delete one or all of them, or turn history off, at any time.
Optional suggestions shown under flagged passages, for example to make a vague opening more specific. Turn them on with the Writing tips switch on your report. They are only for you: never printed, exported or shared, and they don't change your result.
No. Detection is probabilistic pattern analysis, not proof of authorship. A high score means the writing shares measurable patterns with AI-generated text. Treat it as supporting evidence for review alongside drafts, revision history, and conversation with the author — never as a standalone verdict.
ScribeLens detects the measurable patterns AI writing leaves and shows them sentence by sentence. We do not publish a single accuracy figure, because results vary with text length, subject, and writing style. Instead, every verdict shows the sentence-level evidence behind it, so you can check it yourself.
Formal academic prose shares real surface features with AI writing: consistent structure, measured transitions, and even sentence rhythm. ScribeLens weighs sentence-level evidence against document-level style signals, so a paper whose sentences read human is not judged on register alone, and it excludes bibliographies that would otherwise inflate the score. Open the sentence view to see exactly which sentences were flagged and why.
No. Reference lists, citations, and publisher boilerplate are detected and set aside automatically. They appear in the report for transparency but are never scored and never affect the verdict.
No. ScribeLens detects patterns that AI assistants share, so a result tells you whether a passage shows AI-like patterns and where, not which tool produced it.
No. ScribeLens analyses writing patterns for AI-like characteristics. It does not compare your text against published sources or a plagiarism database.
Your analysis is kept in your own browser session so a refresh does not lose it, and it is cleared when the tab closes. A copy is only stored on our side if you explicitly create a verification link, and those expire automatically after 180 days. If you turn on My recent scans, your recent scans are also kept in your own browser, on that computer only, until you delete them or turn history off. Saved class assignments (Pro) are kept the same way; they are never sent to us.
Yes. The ScribeLens AI Detector extension for Chrome checks text without leaving the page. Select text on any web page and right-click "Check with ScribeLens": a side panel shows the overall result, the share of human, mixed and AI-like sentences, and the sentences most worth a look, with the reason for each. Up to 2,000 words are checked in the panel, with the same limits and privacy as the website. Longer text opens on scribelensai.com, where a free account checks the whole document, and "View full report" opens the complete report there without checking the text again.
Run a text and inspect the sentence-level signals behind the verdict. Without an account a scan covers 2,000 words; a free account scans a whole document.