Check your work with Quetxt before you submit.
Review essays and papers for matching sources and text that may show patterns associated with AI writing. Run either check separately or together.
Clear results shouldbe easy to review.
Separate checks, clearer context. Review source matches and AI indicators without combining them into one score.
Explore the report
Designed around student work, from short assignments to final research papers.
Add your text, choose a check, review the evidence in one clear report.
Two checks.Separate results.
What your report
can include
AI results
need context
Separate signals
Different questions.
Different evidence.
Support for everystage of student writing.
Check sources before submission
Find matching passages, open the detected sources and review whether your citations need attention.
Review citations and source matches
Inspect overlap with public web sources, academic publications and the system database.
Check theses and longer assignments
Upload a supported document and work through highlighted passages across a larger draft.
Try Quetxt without an account
Start with a short passage before creating an account or choosing a larger package.
Start checkingQuestions beforeyou pick a plan?
PDF, DOCX, TXT, RTF, ODT and pasted text. Up to 24 MB per upload, and one file or many in a batch.
Under 60 seconds for a typical 5,000-word document. Long-form work (>40 pages) runs in the queue, signed and delivered when done.
Yes. The same scan returns plagiarism and AI signal — fine-tuned weekly on the latest releases from GPT, Claude, Gemini and open-source LLMs.
Open web, academic journals (25,000+), preprint servers, books, news archives and your private corpus if you opt in.
24 MB per file. Longer documents are split per chapter/section automatically.
Yes — Google Workspace, Moodle, REST API, Zapier and a Telegram bot. Custom webhooks on Premium.
Yes. Full upload, scan and view on iOS/Android browsers.
99.0% on our internal benchmark, validated quarterly against multilingual peer corpora and 14B indexed web pages.
Encryption in transit and at rest, EU/US storage of your choice, and a hard delete-on-demand. Documents are never used to train our models.
30+ languages with native diacritics support, including CJK, Arabic and Cyrillic.
Yes — up to 100 files per batch on Standard, unlimited on Premium.
Crawl is continuous. Journal corpora refresh nightly. Models retrain weekly.
Yes. 150 free words per visitor, no card. Standard plan trial is 7 days.
Read your resultswith the right context.
Quetxt reports two different kinds of information: similarity to existing sources and patterns associated with AI-generated writing. Each result identifies material worth reviewing; neither one is an automatic judgment about plagiarism, misconduct or authorship.
What Quetxt checks — and what it does not decide
A plagiarism check compares submitted text with material available through the public web, academic publications and the system database. It highlights overlapping passages and connects them to detected sources so you can review the wording, attribution and citation.
AI detection analyzes patterns within the writing itself. It can report an overall AI probability, a Total AI rate and probabilities for individual sentences or passages. These values are estimates, not proof that a person did or did not use an AI tool.
The two checks answer different questions. A source match does not establish misconduct, and an AI indicator does not establish authorship. The useful next step is always to examine the highlighted text, the available sources and the wider writing context.
How to review matching text and sources
A similarity percentage is a review signal. It shows how much of the submitted text overlaps with detected sources. It does not, by itself, determine whether plagiarism occurred.
A Quetxt plagiarism report can present an overall similarity percentage, highlighted passages, source URLs, the percentage connected to each source, the document word count and the upload date. Read these elements together rather than treating the headline percentage as a pass-or-fail grade.
Which sources may be included
The standard comparison can draw on three broad source groups:
- Public web content — accessible pages that can be matched to the submitted wording.
- Academic publications — scholarly material available to the comparison system.
- The internal system database — documents available within the service's comparison environment.
Institutional repositories, private databases and a user's earlier documents are available only when they have been separately connected or explicitly activated. Quetxt should not be assumed to have access to every university repository or private submission archive.
Why a detected match may be legitimate
Quotations, reference entries, standard terminology, common phrases and correctly cited material can all create overlap. A strong review asks whether the wording is appropriately quoted, paraphrased and attributed rather than relying on the percentage alone.
Important detection limits
Paraphrased plagiarism is not detected reliably in every case. A low similarity percentage therefore cannot guarantee that every source has been acknowledged, just as a higher percentage does not automatically mean the work is improper.
How to interpret AI probability and Total AI rate
AI probability estimates the likelihood that the submitted text as a whole was generated by AI. Total AI rate describes the share of sentences or passages marked as likely AI-generated. Individual sentences may also receive their own probability values.
These metrics are probabilistic. False positives and false negatives are possible, especially with short text, heavily edited writing, technical prose or work produced by multilingual writers. Quetxt does not reliably identify the specific AI model that may have been used.
Use AI detection as one signal, not a verdict. It should not be the sole basis for an academic, disciplinary, employment or other legally significant decision.
What each Quetxt check tells you
Plagiarism checking and AI detection examine different evidence. Choosing both can place the results in one report, but the two analyses remain separate.
| Plagiarism check | AI detection | |
|---|---|---|
| Main question | Does this text overlap with existing sources? | Does the writing show patterns associated with AI generation? |
| Examines | Matching passages and available sources | Patterns within the submitted text |
| Main output | Similarity percentage and source details | AI probability and Total AI rate |
| Automatic proof? | No — context and citation still matter | No — the result is probabilistic |
| Best next step | Review sources, quotations and citations | Review passages, drafts and writing context |
A practical way to use your Quetxt report
- Submit at least 100 characters by pasting text, attaching a supported file or entering a URL.
- Select plagiarism checking, AI detection or both, depending on the question you need to answer.
- Open the highlighted passages instead of relying only on the largest percentage shown.
- For source matches, compare the detected wording with the original page and check the citation.
- For AI indicators, consider drafts, revision history, assignment context and other available evidence.
Processing time depends on the document. A short text may be completed in roughly 20 seconds, while a document of about 100 pages may take up to around 10 minutes. These are approximate ranges, not guaranteed completion times.
Terms used in a Quetxt report
- Similarity percentage
- The share of submitted text that overlaps with sources detected by the plagiarism check.
- AI probability
- An estimate of the likelihood that the submitted text as a whole was generated by AI.
- Total AI rate
- The share of sentences or passages marked as likely AI-generated.
Ready to review your own work? Start a plagiarism check, use the AI detector, or compare the available options on the pricing page.