Research Paper Similarity Check

Research papers live and die by their sources — which is exactly why they produce similarity matches. A pre-submission similarity check shows you every matching passage in your paper so you can confirm each one is quoted, paraphrased, and cited the way it should be.

Common match sources in research papers

Literature reviews, direct quotations, standard methods descriptions, and your own previously submitted drafts all match existing sources — often legitimately. The similarity report highlights each match with its source, letting you distinguish proper citations from passages that need rework.

Pay special attention to paraphrases: if a highlighted passage tracks the original source's wording closely, rewrite it in your own words and make sure the citation is present and correct.

Get your research paper checked

Upload your paper (PDF, DOCX, or TXT, up to 20 MB) or paste the text, enter your email, and pay the flat $5 fee by card. The check is run manually and your report is emailed to you, usually within a few hours — with no account and no subscription.

Your paper stays private: your document is handled only as necessary to provide the checking service. We do not sell your document or use it for marketing. It can be deleted on request after delivery. Payment is handled by Stripe.

Before you resubmit a revised draft

If you revise after feedback, consider a fresh check on the new draft. Revisions often introduce new source material, and a draft you already checked can look different after heavy editing. Each check is a flat $5, so checking per draft stays cheap.

Review your work before you submit

Upload your document, pay $5 securely, and get your similarity report by email — usually within a few hours.