Understand it
where you found it.

Highlight, click or screenshot anything. Explayn explains it, answers your question, or reads it to you.

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Any word or passage, in any app.

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Formulas, charts and scans.

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Read aloud, word by word.

Ask

Any question, about anything on screen.

Files

Word, slides, spreadsheets — drop one in.

Your keys

Every shortcut can be changed to the one you’d reach for.

PDFs and pages

Highlight a PDF in Chrome, explain a page or a chapter — or a YouTube video, from its captions.

Test me

A question on what you just read — in your words or pick from three — marked, and the next questions worth asking.

Every chat kept

Search them, add a note, be tested on them spaced out — and flip through every word you looked up, A to Z.

Read a book aloud

Frame the page once — it reads, turns and keeps going.

Any language

Translate what you highlight, with the idiom explained — or have every answer in yours.

On your own computer

Answers from Ollama or LM Studio, if you’d rather.

Try it here.

Highlight something below, , or . Then highlight a word in the answer to go deeper.

Instead of processing tokens in sequence, the model computes scaled dot-product attention over the entire input at once: each position emits a query, a key and a value, and the softmax of the query-key products decides how much of every other position’s value bleeds into it.

Attention(Q, K, V) = softmax(QKT√dk)V

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Who it’s for

students · medical words · contracts and legal wording · English learners · PDFs · YouTube · code · research papers · dyslexia · teachers

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