AI Code Explainer & Walkthrough
Paste any code to get an animated, line-by-line interactive walkthrough explaining the What, Why, Dry Run simulation, and Gotchas.
Click any demo for instant walkthrough — zero API key required
Why Use AI Code Explainer?
🎓 Line-by-Line Pedagogy
Unlike generic chatbots that output paragraphs of text, our tool decomposes code into atomic logical steps with synchronized line highlighting.
🧩 Four-Dimension Explanation
Every step covers What happens, Why the author wrote it that way, a Dry Run state simulation, and the Gotchas to watch out for.
🔒 100% Private & Client-Side
Your API keys and code never touch our servers. Calls go directly from your browser to Google AI Studio, OpenAI, Anthropic, OpenRouter, DeepSeek, Alibaba, Moonshot, or Zhipu.
Frequently Asked Questions
Which AI models and providers are supported?
You can use Google Gemini (2.0 Flash, 1.5 Pro - free tier available), OpenAI (GPT-4o, GPT-4o-mini, o1, o3-mini), Anthropic Claude (3.5 Sonnet, 3.5 Haiku, 3.7 Sonnet), OpenRouter (200+ models with free options), and Chinese AI providers including DeepSeek (deepseek-chat, deepseek-reasoner), Alibaba Qwen (qwen-max, qwen-plus), Moonshot Kimi (moonshot-v1), and Zhipu GLM (GLM-4 Flash - free tier).
Is this completely free to use?
Yes! The built-in interactive sample walkthroughs require no API key. For your own live code, you can use Google Gemini 2.0 Flash or Zhipu GLM-4 Flash completely free with your own free-tier API key.
How does the Dynamic Model Fetcher work?
When configuring your key, click Fetch Models. The tool connects directly to the provider's models endpoint, lists all models available for your account, and lets you filter and select the exact model ID you want to use.