ExtensionStart Demo: Extension Boilerplate with Paywall

Try a working paid Chrome extension: sign-in, 5 paywall rules and a Stripe test-mode checkout. Built with the ExtensionStart kit.

This demo is a paid Chrome extension built with ExtensionStart, the starter kit for browser extensions that charge money. Sign-in, the paywall, live prices, checkout and the billing portal all come from the kit. Try them here in five minutes, then build your own extension on the same code. What the ExtensionStart kit gives you • Sign-in that works in Manifest V3: Google, or email and password, on Firebase or Supabase. • Payments through Stripe, Polar or Paddle: subscriptions, lifetime purchases, trials and credit packs. Prices live at your payment provider, so changing one needs no new release. • A paywall set in one file: free features, daily or lifetime allowances, Pro-only features and credits checked on the server, with the upgrade dialog, locks and usage meters built in. • One setup command that creates your backend project, deploys the API and seeds your products. • Ready for store review: few permissions, a check for remote code, store screenshots taken from your own UI, a website with a privacy policy and terms, and a release workflow for Chrome, Edge and Firefox. • A Chrome extension boilerplate on WXT, React and TypeScript, with unit and browser tests, and instructions an AI coding agent can follow. • The source code, in a private GitHub repository, for a one-time purchase at extensionstart.com, with every future release included. Try it in five minutes • Five tools that restyle the page in your tab, each behind a different paywall rule. • The upgrade dialog with monthly, annual and lifetime plans, a 7-day trial and credit packs. • A Stripe checkout in test mode: pay with 4242 4242 4242 4242, any future date and any security code. Nothing is charged. • The billing portal to manage or cancel a plan, a banner sent from the backend, light and dark themes, and Settings → Reset free uses to see every wall again. The five tools (example) • Background color: six light colors. Free. • Bigger text: the page at 125%. 3 a day. • Dark page: the page in dark colors, pictures as they are. 5 free uses, then Pro. • Hide images: takes pictures and video off the page. Pro only. • Fancy font: the page's text in a handwriting font. 1 credit a use. Click a tool again to turn it off, for free, or Reset page to undo everything. The second screenshot shows the one file that sets these five rules. Get the kit: https://extensionstart.com Support: support@extensionstart.com