XFastr - AI Reply Generator for X

Generate smart AI-powered replies for X (Twitter) posts instantly. Save time crafting engaging responses.

Save time crafting the perfect response. XFastr generates AI-powered reply suggestions directly on X (Twitter), helping you engage faster and more thoughtfully with your feed. NEW FEATURE: • Reply via speaking, AI automatically writes it for you How it works: • Reply cards appear automatically below tweets on your home feed and tweet detail pages • Click any suggested reply to instantly insert it into the reply composer • Toggle the AI on or off anytime with one click Features: • Smart, context-aware replies generated by AI • Seamless integration — works right inside X.com • One-click insertion into Twitter's reply box • Manual "Generate" button for pages without auto-generation • Regenerate replies anytime for fresh suggestions • Clean, minimal UI that matches X's design • Whether you're building an audience, networking, or just want to reply without overthinking, XFastr helps you stay engaged without the effort. AI reply generator, X.com extension, Twitter replies, smart replies, AI assistant, engagement tool, automated responses, social media productivity, reply suggestions, content creator tools