Science homework
Evaporation happens when the particles at the surface of a liquid gain enough energy to escape into the air as a gas, which is why puddles disappear faster on hot, windy days.
Hear it read,
word by word.
Explayn reads any page, PDF or part of the screen aloud in a natural voice and lights up each word as it is said — and explains any word you get stuck on.
Try it here.
Highlight the sentence and choose Listen, or highlight “evaporation” to have it explained. Then highlight a word in the answer to go deeper.
Each word lit as it’s said
Follow along on the page itself — the highlight moves with the voice, at the speed you choose.
Natural voices
Clear neural voices, or your computer’s own; slower or faster with one key.
Stuck on a word?
Highlight it: Explayn explains it in plain words and says how it’s pronounced.
Questions
Does it read PDFs and scanned pages?
Yes — PDFs, web pages, Google Docs, and any part of the screen, including pictures of text.
Can it go slower?
Yes — choose the speed, and pause or go back a sentence any time.
How much does it cost?
Nothing. Explayn is free, with no account.
Explayn is also for
students · medical words · contracts and legal wording · English learners · PDFs · YouTube · code · research papers · teachers