SubRank analyzes video subtitle files (SRT/VTT) for SEO and generates publish-ready content. Upload your file or paste a YouTube URL, enter target keywords, and get an instant SEO score (0-100), actionable recommendations with timecodes, AI-generated blog articles, HTML with schema.org markup, and optimized YouTube descriptions with auto-generated chapters. Built for creators, SEO marketers, and agencies who want to turn video content into organic search traffic. Solo-founded, built in public.