write better posts
without leaving the tab.
the PostAI extension lives inside x.com and linkedin.com. AI writer overlay, viral score on every post in your feed, one-click adapt — all without switching tabs or breaking your flow.
AI writer overlay
a floating panel appears when you start composing on x.com or linkedin.com. write, refine, and tone-match without opening a new tab.
viral score badge
every post in your feed shows a small engagement-potential badge. see which posts are likely to go viral before you engage with them.
one-click "adapt this post"
see a post you like? click the PostAI button and get a version rewritten in your voice — same idea, your style.
quick compose popup
click the PostAI icon in your browser toolbar to open a quick compose window. draft and schedule without navigating anywhere.
synced with your account
your voice model, scheduled posts, and content drafts are all in sync with your PostAI account. pick up where you left off.
get started in 3 steps
install from chrome web store
one click, no configuration needed. works immediately after install.
connect your postai account
click the extension icon and sign in. your voice model and account sync automatically.
start writing
visit x.com or linkedin.com. the AI overlay appears when you open the compose box.
permissions — and why we need them
we believe in full transparency. here is every permission the extension requests and exactly what it is used for. the extension only reads what is visible on screen and never accesses your passwords, DMs, or private data. the source code is publicly auditable.
browser support
any Chromium-based browser is supported. Firefox support is planned.
never leave the tab to write a great post.
install in one click. free with your PostAI account.