# Explain Selected vs ExplainPaper

Explain Selected records 0 monthly visits with — month-over-month growth and Free pricing. ExplainPaper records 26,016 monthly visits with -39.3% growth and Freemium pricing.

| Metric | [Explain Selected](https://openaitools.app/tool/explain-selected) | [ExplainPaper](https://openaitools.app/tool/explainpaper) |
| :--- | :--- | :--- |
| Website URL | https://chromewebstore.google.com/detail/explain-selected/mgdagfcgfpcglofdkfgaajafcmniddcc | https://www.explainpaper.com |
| Categories | AI Answer, AI Reader, AI Assistant, AI Language Learning | AI Research Papers, AI Research Tool, Large Language Models (LLMs), AI Reader |
| Pricing Model | Free | Freemium |
| Monthly Visits | 0 | 26,016 |
| MoM Growth Rate | — | -39.3% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 9,686 |
| Review Score | 3.8 | 4 |
| Saved Count | 1 | 13 |
| Supported Platforms | Browser Extension | Website |

## Explain Selected

Explain Selected is a lightweight Chrome extension that removes the friction from looking up unfamiliar words while you read. Instead of opening a dictionary tab and scanning through a dozen senses to find the one that fits, you highlight the word or phrase in place and a purple circle appears. One click gives you the definition, the pronunciation and a plain-language explanation written for that specific context.

The distinguishing feature is contextual disambiguation. English is full of words whose meanings have almost nothing to do with each other — the extension's own example is "pounds", which can mean a unit of weight, a verb describing hitting something, or the British currency. Rather than presenting all three blindly, Explain Selected passes the surrounding sentence to ChatGPT and asks it to infer which sense is actually in play, then retrieves the corresponding Merriam-Webster entry and audio pronunciation. It also handles text that no dictionary covers well, such as current slang and narrow technical terminology.

It is aimed at people who read a lot of English online and want to keep their flow: language learners building vocabulary, professionals working through technical documents, and anyone who keeps encountering words with multiple meanings. Useful selections can be saved to a personal list for later memorization, or shared. Two practical caveats from the listing: extensions do not run in tabs that were already open when you installed it, so refresh those tabs first, and no extension works on Chrome internal pages such as the Chrome Web Store itself.

**Pricing & Plans:** Free. The extension is offered at no cost in the Chrome Web Store, with no in-app purchases listed.

- **Context-aware definitions:** ChatGPT infers which sense of a word fits the sentence you highlighted, instead of dumping every dictionary entry at once.
- **Merriam-Webster definitions and audio:** Matching dictionary entries and audio pronunciation are pulled in so you can hear as well as read the word.
- **One-click purple circle:** Select text and click the purple circle that appears — no popup windows, no copy-pasting into a separate tab.
- **Personal saved list:** Add words you want to remember to a personal list so you can review them later.
- **Share with others:** Send individual explanations to friends when a word or phrase is worth passing on.

**Strengths:** Resolves ambiguous words by using the surrounding sentence rather than guessing; Combines AI explanations with established Merriam-Webster definitions and audio; Works inline on any web page with a single click and no context switching; Saving and sharing selections make it useful for building vocabulary over time

[Profile (Markdown)](https://openaitools.app/tool/explain-selected.md)

## ExplainPaper

ExplainPaper takes the friction out of reading academic literature. Instead of parsing equations, acronyms, and field-specific jargon alone, you upload a PDF and highlight whatever you don't understand. The tool returns a short, contextual explanation of that passage, and you can dial the complexity up or down to match whether you're a newcomer to the field or an expert skimming for detail.

The explanations are context-aware: the model reads the surrounding paper so a highlighted term is explained in the sense the authors actually meant, not in a generic dictionary sense. You can request answers in more than 50 languages, which makes English-language research accessible to readers worldwide. Beyond highlights, a chat mode lets you ask follow-up questions about the paper and get answers drawn from the document itself, with pointers back to the relevant sections.

ExplainPaper also extracts structure for you. It can produce a smart outline, pull out the key findings and main arguments, and show how concepts in the paper connect. The service is used by a large community of researchers and is offered free with usage limits, with a paid Pro tier that unlocks stronger models, whole-paper summaries, and saved highlights.

**Pricing & Plans:** Freemium. The free tier costs $0 and includes unlimited highlight explanations, follow-up questions, and access to basic AI models. Pro is listed at $16/month and adds explanations powered by a more advanced model, whole-paper summaries, saved highlights and explanations, and paper Q&A, after a 7-day Pro trial that requires a card on file. Confirm current pricing on the provider's pricing page.

- **In-context highlight explanations:** Select any confusing sentence or term and receive an immediate plain-language explanation that accounts for the rest of the paper.
- **Adjustable explanation depth:** Shift the reading level from beginner-friendly to expert-detail so the explanation matches your background.
- **Chat with your paper:** Ask questions and get answers grounded in the document's actual content, with references back to the relevant sections.
- **Auto-generated insights:** Produce a smart outline, key-point extraction, and concept relationship views without reading the entire paper first.
- **50+ explanation languages:** Get explanations in your native language, making English-language research easier for a global audience.

**Strengths:** Explains passages in the context of the whole paper rather than in isolation; Reading-level control makes the same tool useful for novices and experts; Chat mode is grounded in the document, reducing generic or off-topic answers; Supports 50+ explanation languages for global readers

**Limitations:** Free tier is capped, and the strongest models sit behind the Pro plan; Pro trial requires a payment card up front; Not a substitute for careful reading of methods and statistics in high-stakes work

[Profile (Markdown)](https://openaitools.app/tool/explainpaper.md)

## Frequently Asked Questions

### How do Explain Selected and ExplainPaper compare in monthly traffic?

Explain Selected has 0 monthly visits, while ExplainPaper has 26,016. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Explain Selected has a month-over-month growth rate of —; ExplainPaper has -39.3%.

### How does pricing compare?

Explain Selected: Free. Free. The extension is offered at no cost in the Chrome Web Store, with no in-app purchases listed. ExplainPaper: Freemium. Freemium. The free tier costs $0 and includes unlimited highlight explanations, follow-up questions, and access to basic AI models. Pro is listed at $16/month and adds explanations powered by a more advanced model, whole-paper summaries, saved highlights and explanations, and paper Q&A, after a 7-day Pro trial that requires a card on file. Confirm current pricing on the provider's pricing page.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Semantic Scholar](https://openaitools.app/tool/semantic-scholar) | 8,198,672 | +5.8% | Free | A free, AI-powered academic search engine for 240M+ papers across every scientific field | [.md](https://openaitools.app/tool/semantic-scholar.md) |
| 2 | [SciSpace](https://openaitools.app/tool/scispace) | 4,464,111 | +8.6% | Freemium | AI research platform for reading, understanding and writing scientific papers | [.md](https://openaitools.app/tool/scispace.md) |
| 3 | [Language Reactor](https://openaitools.app/tool/language-reactor) | 1,878,769 | +0.6% | Freemium | Learn languages from Netflix, YouTube, and real-world texts with dual subtitles and AI | [.md](https://openaitools.app/tool/language-reactor.md) |
| 4 | [ChatPDF](https://openaitools.app/tool/chatpdf) | 1,044,477 | -3.7% | Freemium | Chat with any PDF, video, or website and get cited answers in seconds | [.md](https://openaitools.app/tool/chatpdf.md) |
| 5 | [ResearchRabbit](https://openaitools.app/tool/researchrabbit) | 831,571 | +3.1% | Free | Map the literature around the papers you love—free | [.md](https://openaitools.app/tool/researchrabbit.md) |
| 6 | [Connected Papers](https://openaitools.app/tool/connected-papers) | 750,576 | +3.1% | Freemium | Explore the academic literature as a visual graph of related papers | [.md](https://openaitools.app/tool/connected-papers.md) |
| 7 | [WisPaper](https://openaitools.app/tool/wispaper) | 107,817 | +0.1% | Freemium | Screen thousands of papers down to the studies that matter | [.md](https://openaitools.app/tool/wispaper.md) |
| 8 | [Paper Digest](https://openaitools.app/tool/paper-digest) | 97,202 | -7.1% | Freemium | AI-powered platform to read, write, and stay current with research | [.md](https://openaitools.app/tool/paper-digest.md) |
| 9 | [CastReader](https://openaitools.app/tool/castreader) | 55,999 | +9.8% | Freemium | Read aloud webpages, PDFs, Kindle books and AI answers with synced highlighting | [.md](https://openaitools.app/tool/castreader.md) |
| 10 | [ResearchPal](https://openaitools.app/tool/researchpal) | 55,231 | -5.2% | Freemium | One AI agent for finding, reading and writing with real research | [.md](https://openaitools.app/tool/researchpal.md) |

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Source: https://openaitools.app/compare/explain-selected-vs-explainpaper

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