Post5s

Post5s (branded "Post 5s" on its own site) is a lightweight Chrome extension designed around one very specific job: helping small online sellers publish product posts on Facebook without spending 15–20 minutes writing each caption. You browse to a product photo — on Shopee, on a Facebook page, or literally any website with an image — right-click, and choose the extension's "create post" action. The AI reads the image context and returns a polished caption along with a set of relevant hashtags you can copy straight into Facebook.

The tool is aimed at the Vietnamese e-commerce market: the landing page, demo and support are in Vietnamese, and the promoted workflow covers Facebook Shops, Shopee Seller accounts and independent digital marketers. The vendor reports thousands of users and over a million generated posts, and positions speed as the core value — roughly 90% of the time previously spent on manual caption writing.

Because the extension works from the browser context menu rather than a dashboard, there is no separate app to learn and no content library to manage. You install it from the Chrome Web Store, right-click an image, generate, copy and paste. The site also accepts voluntary donations through PayPal, suggesting the tool is maintained as a mostly free utility with optional paid support.