Paste text or upload file
Use direct text or a supported document. Certentis automatically detects file names and available metadata.
Plagiarism Checker
Check for plagiarism with matches and source context
The Certentis plagiarism checker compares pasted text and supported documents with discoverable sources. Its report links highlighted passages to sources and separates plagiarism, similarities, and citations.
A match is a flag for review. Whether content is properly cited, common knowledge, or problematic must be evaluated using the match and source.
Design preview · sample media · not press mentions
03Reading the report
Similarity is not automatically plagiarism
Reference lists, standard technical terms, correctly cited direct quotes, and common phrasing can trigger matches. Therefore, never evaluate based solely on the overall percentage.
Document with Matches
Matching passages are highlighted in the text and remain linked to their respective source.
- Compare highlighted passage with original source
- Verify proper citations for direct quotes and paraphrases
- Assess bibliography and recurring terminology separately
04Sources found
Check matches and sources together
Source 01 · 4,2 % Source 02 · 1,8 % Source 03 · 0,7 %
05In three steps
How to check a document for plagiarism
Wait for background check
The source matching continues independently in the background. The report history updates active checks automatically.
Evaluate matches and sources
Open the completed report, review highlighted passages, and check whether citations and references fit the respective context.
06Transparent instead of broad
A plagiarism checker that connects matches to sources
It's not just the total count that matters. Specific text passages, their sources, and the nature of the match are key.
Check text and documents
Paste text directly or upload a supported document. The title is optional and can be applied automatically from the file.
Highlight matches in the document
Matching sections are highlighted so you can read them directly in context.
Open sources individually
Each source found remains linked to its proportion and associated passages.
07Control over black boxes
What makes Certentis different
A match is a flag for review. Whether content is properly cited, common knowledge, or problematic must be evaluated using the match and source.
Original remains visible
When humanizing, compare the original text and rewrite directly instead of accepting an opaque output.
Compare highlighted passage with original source
Probabilities are explained
AI detection is presented as statistical classification, not definitive proof of authorship or quality.
Verify proper citations for direct quotes and paraphrases
Matched passages link to sources
Plagiarism matches remain linked to specific text passages and accessible sources.
Assess bibliography and recurring terminology separately
08 · Open evidence
Read the metrics. Review the method. Know the limits.
Certentis separates results, test protocol, and product comparison so it remains clear what was measured and what the test cannot establish.
Essays, papers, and theses
Check paraphrases, direct quotes, and reused source material before submission using specific matches and accessible original sources.
Reports and publications
Review longer documents and keep track of reused phrasing as well as external sources.
Editorial content
Compare drafts with publicly available sources before content is published or shared.
09Plagiarism Checker
Frequently Asked Questions
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