AI-powered research paper reader that explains complex academic papers in plain language. Highlight any confusing passage and get instant AI explanations, including math formulas. Trusted by 400,000+ researchers. Free forever plan available with unlimited highlight explanations.
Explainpaper is an AI-powered research paper reader that lets you upload any academic PDF and instantly get plain-language explanations of complex, jargon-heavy passages. Highlight any confusing sentence or paragraph and the AI generates an accessible explanation—no academic background required. Trusted by over 400,000 researchers, students, and professionals, Explainpaper transforms dense scientific writing into understandable content. Pricing: Free forever (basic AI models, unlimited highlight explanations), Pro at $16/month (advanced AI, math formula explanations, full-paper summaries), and Teams (custom pricing).
Explainpaper runs entirely in the browser—upload a PDF directly from your computer or link to a paper URL. The paper renders in a side-by-side view: the original document on the left, an explanation panel on the right. Highlight any text to trigger an AI explanation instantly. No configuration or prompt engineering required. Free users can start without any account; creating an account unlocks highlights saving and Zotero library integration for connected reference management workflows.
Explainpaper's core interaction is elegantly simple: highlight any confusing term, sentence, or paragraph in a research paper and receive an instant AI-generated explanation in plain language. The NLP engine understands academic context—identifying when text references methodology, statistics, or domain-specific terminology—and adjusts the explanation depth accordingly. Explanations are grounded in the surrounding paper context rather than generic definitions, meaning the AI explains what a term means in this specific paper rather than providing a Wikipedia-style definition.
One of Explainpaper's most unique capabilities, available on the Pro plan, is Math Explain: the ability to highlight mathematical equations, statistical formulas, and quantitative notation and receive step-by-step plain-language breakdowns. For ML researchers, economists, and data scientists encountering unfamiliar mathematical constructs in papers, this eliminates the need to separately look up formula derivations or search textbooks. The explanation includes what the formula computes, what each variable represents, and how the result relates to the paper's argument.
Beyond individual highlight explanations, Pro users can generate a complete structured summary of an entire paper with a single click. The AI reads the full document and produces an executive summary covering research question, methodology, key findings, limitations, and implications. This is particularly valuable for researchers conducting literature reviews, where quickly assessing whether a paper is relevant to a specific inquiry can save hours. The summary includes the paper's contribution to its field, making it suitable for citation screening in systematic reviews.
Explainpaper connects directly to Zotero, the most widely used academic reference manager. After authenticating, users can import their entire Zotero library into Explainpaper, opening any stored paper in the explain interface without re-uploading. Saved highlights and explanations persist across sessions, enabling cumulative annotation of papers as understanding deepens. For researchers who maintain ongoing literature libraries in Zotero, this integration makes Explainpaper a seamless add-on rather than a separate tool.
Go to explainpaper.com and click "Upload Paper" to add any PDF from your device. The paper loads in the reader view. Find a complex sentence in the abstract or introduction and highlight it with your mouse. An explanation popup appears in the right panel within 2–3 seconds. Try highlighting a statistical term like "p-value < 0.05" or a domain-specific abbreviation to see how context-aware the explanations are. For Pro users, click the "Summarize Paper" button at the top to generate the full paper summary before diving into individual sections.
Start with the abstract and introduction highlights to build foundational understanding of the paper's domain vocabulary before moving to methods and results sections. Save all explanations for any paper you intend to cite—they serve as a ready-made explanation scaffold for your own writing later. For systematic literature reviews, use the full-paper summarization feature to screen 20–30 papers per hour, saving only those with relevant methodology and findings for detailed reading. Connect your Zotero library to ensure new papers you add are immediately available in Explainpaper without manual uploading.
Explainpaper has developed a dedicated following among ML researchers and students: Reddit discussions about Explainpaper frequently feature it as the top recommendation for reading ML papers outside your primary expertise. Researchers note that the highlight-to-explain interaction is far more effective than asking ChatGPT to explain a passage, because Explainpaper understands the specific paper context rather than providing generic explanations.
Explainpaper is the best AI-powered research paper reader for academics, researchers, and data scientists who need to understand papers outside their core expertise. Its highlight-to-explain interface delivers instant, context-aware plain-language explanations of complex academic writing, while Pro features add math formula interpretation and full-paper summarization for deeper analysis. The free forever plan removes all barriers for casual users, and Zotero integration makes it a natural extension of existing academic workflows. For anyone who reads scientific literature regularly, Explainpaper is the most efficient NLP-powered tool for converting jargon-dense papers into actionable understanding.
Generate high-quality written content quickly and efficiently, tailored to your specific needs. Enhance your writing process with intelligent suggestions and seamless editing capabilities.
A tool that enhances your writing by improving clarity, grammar, and style, ensuring your text is polished and professional.
