How to Use Plagiarism Checker
Follow these steps, then review the result and the limitations below:
- Paste your original draft, student paper, or blog post into the "Your Text / Draft" field.
- Paste the reference article, webpage content, or competitor text into the "Comparison / Source Text" field.
- Click "Compare Texts" to count words from your draft that also appear in the comparison text.
- Review the matching word count and percentage; inspect the passages yourself for copied phrasing.
Practical Worked Example
Draft: "red blue red". Source: "red green". Two of the three draft words appear in the source, so the displayed similarity is 66.7%. Word order is not checked.
Key Features & Capabilities
- Instant client-side lexical comparison without cloud queues or wait times.
- The comparison code runs locally without a tool API request. Avoid entering sensitive material on pages that load third-party services.
- Shows draft word count, matching word count, and a word-overlap percentage.
- Completely free with unlimited text comparisons and no character quotas.
Reading the percentage correctly
The denominator is the draft word count. Repeating a matching word three times in the draft counts three matches, even if it appears once in the source. Swapping draft and source can therefore change the percentage.
Two texts about the same subject often share ordinary vocabulary. A high score can come from common words, and a low score can still contain an unattributed copied idea. There is no safe percentage for academic integrity.
A practical comparison workflow
Compare one relevant source passage at a time, then read the sentences side by side. Check quotations, attribution, and meaning yourself. This tool cannot assess whether a citation is sufficient.
Letters, combining marks, and digits are normalized and compared without case. Word order and synonyms are ignored. Languages without spaces need special segmentation that this simple tokenizer does not provide.
How It Works (Technical Overview)
JavaScript lowercases and splits both passages into letters and digits. It counts each draft word whose exact spelling appears anywhere in the source text and divides that count by the number of draft words. This is a word-overlap comparison, not a plagiarism verdict or web search.
Real-World Use Cases & Applications
- Academic drafting: Compare a draft with a known passage before manually checking quotations and attribution.
- Content marketing: Copywriters and editors ensuring guest posts or outsourced articles do not mirror source research too closely.
- Copy editing: Identify shared vocabulary between two supplied passages without treating the score as proof of originality.
Privacy, Security & Accuracy
This tool computes exact word overlap, ignoring case and order. It does not detect partial matches, paraphrasing, copied ideas, or web sources.
Pro Tips for Best Results
To achieve the most accurate comparison, remove bibliographies, author names, and repetitive header/footer disclaimers from both boxes before running the analysis.
Frequently Asked Questions
Does this plagiarism checker save or publish my uploaded text?
The comparison code processes the two passages locally. The page also loads third-party services; do not paste confidential documents.
Does this tool scan the entire live internet index?
This tool performs direct, deterministic comparison between two specific passages or documents. For full-web indexing, proprietary search crawlers are used, whereas this tool is ideal for fast draft comparisons against known source documents.
What similarity percentage is considered safe?
There is no safe threshold. This score counts shared words, not copied phrases or ideas. Review the actual passages and attribution.
Can I compare text in languages other than English?
The tokenizer recognizes Unicode letters, combining marks, and digits, including Urdu. It does not perform language-specific segmentation or compare meaning.
Related Tools
Explore complementary tools in the Text & Writing suite:
- Grammar Checker — Check English text against a limited set of spacing, capitalization, and wording rules.
- Word & Character Counter — Count words, characters, sentences, and paragraphs, with estimated reading and speaking times.
- AI Content Detector — Inspect sentence-length variation, vocabulary repetition, and common phrases in a text sample. Results cannot establish authorship.