Free trial
No separate trial is advertised. The free checker itself functions as the entry point, and premium features are sold as plans on the pricing page.
Learn moreDuplichecker
Free plagiarism checks with readable, colour coded reports
Beginner
What is Duplichecker?
Duplichecker is a content detector tool. A free, browser based plagiarism checker that accepts seven document formats, returns a percentage similarity score with colour coded highlighting, and extends to several languages beyond English. Paid plans add longer documents, deep and academic scans, and extra detection modes.
Duplichecker is a web based plagiarism checker built for anyone who has to prove that a piece of text is original. Students, teachers, bloggers, webmasters and professional writers can drop in an essay, a thesis chapter, a research paper or a client draft and get a similarity score expressed as a percentage, alongside a breakdown of which phrases came back as duplicates and which stayed unique. The pitch is speed and clarity: the site promises fast report generation even when the deeper scanning modes are switched on, and the interface is deliberately plain so that a first time user needs no explanation. In practice you paste text into the box or upload a file, then press the check button. Seven document formats are accepted (.tex, .txt, .doc, .docx, .odt, .pdf and .rtf), and files can come from your device or from cloud storage. The free text box takes up to 10,000 characters, while the paid tiers advertise handling of up to 25,000 words. A settings panel lets you choose a normal scan or one of the premium modes (deep scan, academic scan, fingerprint), and the same panel hosts an AI detection toggle and options to exclude quotes and bibliography, both marked as Pro. Results are colour coded, with copied sentences highlighted in pink and unique material left plain, so the report can be read without hunting for a conclusion. A download button saves the report for later reference. The tool also reaches beyond English, claiming operative support for Spanish, Russian, Portuguese, Dutch, Indonesian, Italian and Arabic, with localised versions of the site for those markets. That makes it a reasonable fit for teachers grading mixed language cohorts or freelancers handling international clients. It sits in a crowded field of free similarity checkers, and its case rests on breadth of accepted file types, the multi language coverage and the extra writing utilities bundled on the same domain (paraphrasing, grammar checking, a word counter, an AI text generator, PDF conversion and more). Buyers who need institutional databases rather than web comparison should look elsewhere; Duplichecker compares submissions against online sources and states that uploaded material is not stored.
How do you use Duplichecker?
1Open the plagiarism checker
Go to the Duplichecker homepage, where the plagiarism checker sits at the top as the default tool alongside plans for paraphrasing and reverse image search.2Add your text or upload a document
Paste content straight into the text box (up to 10,000 characters on the free entry) or use the upload option for .tex, .txt, .doc, .docx, .odt, .pdf or .rtf files from your device or cloud storage.3Adjust scan settings
Open the settings panel to pick normal scan or a premium mode such as deep scan or academic scan, and toggle AI detection or quote and bibliography exclusion if your plan allows them.4Run the check
Press the Check Plagiarism button and wait for the similarity report to generate; the site advertises fast turnaround even with deeper scanning enabled.5Read the colour coded report
Review the percentage score and the highlighted duplicate phrases, which appear in pink against the unique text, then use the download option to save the report for your records.6Remove or rewrite flagged passages
Act on the flagged sentences by rewriting them yourself or by moving to the site's paraphrasing tool, then rerun the check to confirm the score has dropped.
Pros and cons
Pros
- Free tier works without an account and accepts pasted text or uploaded filesAI
- Seven supported document formats, including .tex, .odt, .pdf and .rtfAI
- Colour coded report marks duplicated sentences, and results can be downloadedAI
- Interface and reports are available in numerous languages beyond EnglishAI
- Bundled writing tools such as paraphrasing, grammar checking and a word counter sit on the same siteAI
Cons
- Free text entry is capped at 10,000 characters, which is short for a thesis or long reportAI
- Deep scan, academic scan, fingerprinting, quote exclusion and bibliography exclusion all sit behind the Pro paywallAI
- No public evidence on the homepage of partnerships with academic databases or publisher repositories, so the comparison base is web sourcesAI
- Interface is dense with banner ads and cross promotions, which distracts from the checking workflowAI
- Report quality depends on how the tool interprets paraphrasing, and no accuracy benchmark is publishedAI
How much does Duplichecker cost?
Pricing
The checker can be used free of charge, with a Pro tier sold through a dedicated plagiarism plans page. The homepage lists premium features such as deep scan, academic scan, fingerprint, quote and bibliography exclusion, ad free checking and support for up to 25,000 words, but it does not publish prices; those appear on the pricing page.
Learn moreSupport
A feedback link is present on the checker page and a support point is listed among the tool's selling points, but the homepage does not describe support channels, hours or response times.
Integrations
No third party integrations are described on the homepage. Files can be pulled from device or cloud storage at upload time, and the site links out to grammar checking through a partner placement.
Features
Paste or upload text in seven formats, run normal or premium scans (deep, academic, fingerprint), toggle AI detection, exclude quotes and bibliography on Pro, and read results as a percentage with pink highlighted duplicates. Reports can be downloaded, uploads are discarded after checking, and the tool covers English plus Spanish, Russian, Portuguese, Dutch, Indonesian, Italian and Arabic.
Frequently asked questions about Duplichecker
How much does Duplichecker cost?
The checker can be used free of charge, with a Pro tier sold through a dedicated plagiarism plans page. The homepage lists premium features such as deep scan, academic scan, fingerprint, quote and bibliography exclusion, ad free checking and support for up to 25,000 words, but it does not publish prices; those appear on the pricing page.Does Duplichecker offer a free trial?
No separate trial is advertised. The free checker itself functions as the entry point, and premium features are sold as plans on the pricing page.How do you use Duplichecker?
The walkthrough on this page covers 6 steps: 1. Open the plagiarism checker 2. Add your text or upload a document 3. Adjust scan settings 4. Run the check 5. Read the colour coded report 6. Remove or rewrite flagged passages.What platforms does Duplichecker support?
Duplichecker is available on Web App.What does Duplichecker integrate with?
No third party integrations are described on the homepage. Files can be pulled from device or cloud storage at upload time, and the site links out to grammar checking through a partner placement.What are the limitations of Duplichecker?
Free text entry is capped at 10,000 characters, which is short for a thesis or long report. Deep scan, academic scan, fingerprinting, quote exclusion and bibliography exclusion all sit behind the Pro paywall. No public evidence on the homepage of partnerships with academic databases or publisher repositories, so the comparison base is web sources.
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Added10/21/2026
Platforms
Web App
Pricing
FreeFreemium
