Free tools
Tools for people who write their own posts
No signup, no email, no upload. Both of these run entirely in your browser, which is why we can hand them to you before you have told us anything about yourself.
No accountNothing leaves your browserNo AI call, so no cost to run
How to check we mean it
Open your browser devtools, switch to the network tab, and type into either tool. Nothing fires. There is no server action, no API route and no model call behind these pages, because the work is string matching and it belongs in the tab you are already in.
Common questions
- Do I need an account to use these?
- No. There is no signup, no email gate and no trial. Open the page and start typing. Neither tool has a server route behind it.
- Does my text get sent anywhere?
- No. Both tools are plain JavaScript that runs in the tab you already have open. Your draft never leaves the browser, so there is nothing for us to store, log or train on.
- Why are they free?
- The reply checker is the honest demo. It is the same linter every Quillen draft has to pass, so the fastest way to show you what the product actually does is to let you run it on your own writing, for free, before you give us anything.
- Is the AI reply checker a detector?
- No, and be suspicious of anything that claims to be one. It matches a fixed list of phrases that language models overuse. A human can write every one of them, and a careful model can avoid all of them. It is a phrasing check, not a verdict on authorship.
These fix a sentence. Quillen fixes the habit.
The checker runs on one draft at a time, after you have already written it. In the product the same linter runs on every draft before it reaches you, against a persona built from your own writing, on conversations we found for you.