The checker works as a loop: paste, read, fix, test again. The loop is where the value sits.

Paste your draft

Copy the text as it stands, whether that is a full product page or one paragraph you're unsure about, and paste it into the box above. The checker reads what is actually there, so paste the finished sentence.

Read the verdict

You'll get a reading level, an average sentence length, a passive voice count, a jargon count, and an overall clarity verdict, with the sentences causing trouble underlined in the text itself. A reading level score such as Flesch-Kincaid tells you how much effort the sentence structure asks of a reader; it does not tell you whether the sentence is true, persuasive, or right for the person you're writing to.

Fix the flagged sentences

Work through the underlined sentences one at a time. A sentence flagged for passive voice usually has a missing actor, so "the order will be processed" gets clearer once you name who processes it. A sentence flagged for length often has two ideas sitting in it; split it where the second idea starts, or join the two with an ordinary word like "because" or "so".

Test again

Run the edited version back through before you decide it's finished. Removing one passive sentence sometimes lengthens another close to it, and testing again is how you catch that.

Treat the verdict as a reading. The checker counts patterns in a sentence; it cannot tell whether a particular word is jargon to your reader or plain English to them, so use its flags as a prompt to look again at that sentence.