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Tools for digital content authenticity

Digital content Understand. Check. Improve.

Certentis helps you understand AI patterns, find source matches and revise texts in a controlled way. Keep analysis, sources and changes easy to trace in one workspace.

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Three tools. Three real free trials.

Check each Certentis tool once without account. No demo values – you go get real result.

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Original

The text wey you wan check

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AI Analysis

Sentence signals and classification

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Put at least 100 characters. Di analysis go show for here straight after.

AI detector

Continue for free

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500 free credits · e go last 7 days

Certentis result

Understand scanner result well

The three values na class probabilities for the whole document. Dem no be sentence or text portions.

  • Probabilities

    Human-like, Mixed and AI describe how much the document’s overall pattern resemble each text class.

  • No be text portion

    An AI score of 40 percent no mean say 40 percent of the sentences come from AI. E dey describe how confident the classification be.

  • Na only indication

    Scanners fit make mistake. The result na guide, e no be proof of who truly write the text.

Guide

How to read the probability scale

The bars show example of AI probability increasing. Values between 40 and 70 percent dey inside uncertain grey zone.

How to read the probability scale

  • Example value 10% AI probability
  • Example value 25% AI probability
  • Example value 40% AI probability
  • Example value 55% AI probability
  • Example value 70% AI probability
  • Example value 85% AI probability
  • Example value 100% AI probability
Certentis presentation of the class probabilities. The scale na only for guidance; one analysis value no be proof.

For more context: See how the Certentis AI analysis dey work

Text integrity for one workspace

One text. Three checks.

Certentis dey combine three precise text tools: more natural wording, clear AI analysis and transparent plagiarism reports. You go keep the original, result and evidence for eye.

  • AI detector

    How reliable be an AI detector?

    The AI detector probabilities describe the pattern of the complete text. Dem no be percentages for individual sentences, and dem no prove who write the text.

  • Plagiarism checker

    Similarity no automatically mean plagiarism

    One match na clue for review; e no be proof of plagiarism. Compare the matching passage with the original source yourself to see whether e get correct citation, na proper paraphrase, common knowledge, or something wey need correction.

  • Humanizer

    Natural writing no mean say you go simplify everything

    For everyday writing, work, editing and study—with special focus on academic terms and quotations. E no be translation, and AI detector results no dey guaranteed.

Three tools, one clear process

From first draft reach result wey you fit check

Use each tool alone or follow the steps one by one. Certentis dey keep rewriting and analysis separate, so results go clear and easy to control.

01Writing

Humanizer

Make existing AI text sound more natural and flow better. E go detect the input language automatically; meaning, technical terms and quotes get special protection.

  • Compare the original and new version side by side
  • Detect the language automatically and keep am
  • Understand AI analysis scores clearly
Check out Humanizer
02Classify

AI Detector

Scan texts independently of Humanizer. You go see the probability for Human, Mixed and AI classes, plus unusual text parts in context.

  • Three class scores instead of one shortened score
  • Highlight sentence parts based on AI probability
  • Open reports anytime from your history
Check out AI Detector
03Prove am

Plagiarism Check

Check pasted text or documents against sources wey you fit reach. The report go show overlaps, places e find matches and the sources wey connect to dem inside a separate workspace.

  • Upload text or supported documents
  • Trace matches directly inside the document
  • Check sources and matching parts separately
Check out Plagiarism Check

3 Steps

Check Digital Content for three clear steps

01

Enter Your Content

Paste text inside any tool. You fit upload document only when you dey use the plagiarism checker.

02

Choose the Tool Weh Fit You

Check AI patterns, find source matches, or rewrite an AI draft. Each tool get its own separate process.

03

Review the Result with Context

Open the detailed probabilities, sentence signals, source matches, or original-result comparison. Then decide your next step.

Check digital content well without missing important details

  • 01

    Understand AI patterns well

    Certentis AI detector shows separate Human, Mixed, and AI probabilities, plus text sections wey stand out for review. These results na signals, no be final proof.

  • 02

    Find text overlaps with sources

    The plagiarism checker links each marked section to the source, so you fit review every match one by one.

  • 03

    Revise AI text with care using AI Humanizer

    Humanizer helps make existing drafts sound more natural. You fit compare the original text and the new result for proper review.

  • 04

    Clear results, not black-box scores

    Reports, text comparisons, and detailed values stay connected in your history. We no go present one score as proof or final verdict.

Control, no be black box

Wetin Certentis dey do differently

One score no fit explain any text. Na why Certentis dey show middle results, differences and sources in a way wey you fit judge by yourself.

  • Original dey remain visible

    When you dey humanize am, you go compare the original text with the new version, instead make you accept answer wey you no understand.

  • We dey explain the probabilities

    We dey show AI detection as statistical assessment, no be proof of who write am or how good e be.

  • Sources go lead you to the source

    Plagiarism matches still dey connected to exact parts of the text and sources wey you fit access.

Open evidence

Read di numbers. Understand di method. Know di limits.

Certentis separate results, test process and product comparison so e go clear wetin dem measure and wetin di test no fit prove.

Humanizer comparison · 10 same cases

Number 1 out of 7 for dis documented test.

Dis short view show overall quality. All di metrics, test rules and limits dey inside di full comparison.

85.4

Overall quality · Certentis

Quality scale 40–100 · axis shortened

Certentis85.4
WriteHuman Academic82.4
StealthGPT Heavy PhD70
RewriteAI69.67
Humbot Advanced65.8
Rephrasy v352.2
HumanizerPro Advanced42.7
406080100
Dis short view show overall quality. All di metrics, test rules and limits dey inside di full comparison.

Internal benchmark · Version 2026-07-28

Compare all seven providers well

Evidence status for all three tools

Evidence status for all three tools
HumanizerBenchmark don publishDem check quality, meaning, language, length, citations and external AI classification for di same test run.
AI DetectorOutput documentedCertentis show document probabilities and sentence signals. We no claim say we get independent accuracy benchmark of our own.
Plagiarism CheckReport structure documentedMatches, sources and overlap dey clear. We no promise say e cover everywhere for web.

Check digital content for their language and understand am for context

Certentis dey detect the input language automatically. AI analysis, source matching and same-language rewriting stay based on the original text, so German, English or multilingual content no go translate by mistake.

40Languages

Automatic language detection dey on

  1. 01Afrikaans
  2. 02Amharic
  3. 03Arabic
  4. 04Armenian
  5. 05Assamese
  6. 06Asturian
  7. 07Azerbaijani
  8. 08Belarusian
  9. 09Bengali
  10. 10Bosnian
  11. 11Bulgarian
  12. 12Burmese
  13. 13Cantonese
  14. 14Catalan
  15. 15Central Kurdish
  16. 16Chichewa
  17. 17Chinese
  18. 18Croatian
  19. 19Czech
  20. 20Danish
  21. 21Dutch
  22. 22English
  23. 23Estonian
  24. 24Filipino
  25. 25Finnish
  26. 26French
  27. 27Fulfulde
  28. 28Galician
  29. 29Luganda
  30. 30Georgian
  31. 31German
  32. 32Greek
  33. 33Gujarati
  34. 34Hausa
  35. 35Zulu
  36. 36Hindi
  37. 37Hungarian
  38. 38Icelandic
  39. 39Igbo
  40. 40Indonesian

Certentis fit into your checking, writing and publishing workflow

Understand your digital content with Certentis

Certentis connect document, analysis and report. Compare versions, understand class probabilities and go through source references one by one, instead of relying on one isolated score.

  • Web app
  • Text input
  • AI detector
  • Plagiarism checker
  • Text comparison
  • Report history

Check Digital Content for schools, teams and publishers

Certentis dey help when the origin, sources and changes to a text need to stay easy to trace.

  • Universities & Teachers

    Use AI signals as guide, check where sources come from, and discuss the results with students in a clear, balanced way.

  • Students & Researchers

    Review your drafts well, watch your citations, and understand plagiarism matches before you submit your work.

  • Editorial & Publishing Teams

    Check submitted texts for AI patterns and source matches, then compare changes before you publish.

  • Companies & Compliance Teams

    Assess documents, reports, and external content with clear review trails instead of relying on one unclear score.

  • Agencies & Content Teams

    Analyze client drafts, make existing AI text sound more natural, and compare the result directly with the original.

  • Multilingual Organizations

    Check and revise texts in the language wey the tool detect, without turning analysis into translation by mistake.

Kweshọn dem about Certentis Certentis

Answers about AI detection, plagiarism checking, Humanizer, languages and how to understand results properly.

Certentis na workspace for digital content authenticity. You fit analyse AI patterns, check text for overlap wit sources and carefully revise existing AI drafts. Di tools dey work separately, and each result stay clear and easy to trace.

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