5 AI tools that replace $20 Fiverr gigs for $0.01 each (BYOK, free, no signup)

I've been building BYOK (bring your own key) AI tools — free web apps where you paste your OpenAI or Gemini API key and get the same output that Fiverr freelancers charge $20-200 for. The cost difference is absurd. The tools Product Description Generator — Paste product features, pick a style (Amazon, Shopify, luxury, social), get 3 description variations. Fiverr price: $20-50 for 5 descriptions. BYOK cost: $0.01. Ad Copy Generator — Enter your product + target audience, get Facebook ads, Google ads, Instagram captions, LinkedIn posts. Fiverr price: $50-200 per ad set. BYOK cost: $0.02. SEO Article Writer — Enter a keyword, get a full SEO-optimized blog post with headings + meta description. Content agencies charge $50-150 per article. BYOK cost: $0.05-0.20. Cold Email Generator — Describe what you sell and who you're targeting. Get a 3-email outreach sequence (initial + follow-up + final touch). Sales consultants charge $100+ for this. BYOK cost: $0.02. Social Media Post Generator — E