Harkback

Explain terms while you read.

Remember what you understood, and get it back when you meet the term again.

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Harkback explaining BLEU in a PDF, answering a follow-up question and typesetting the formula

Explains in context

Select a term and get an explanation based on the paragraph and section you are reading.

Remembers locally

Every explanation is kept in your browser. There is no Harkback server and no account.

Brings it back

When the term shows up again, even spelled differently, you see what you understood last time.

You bring your own model: Chrome's built-in model or Ollama on your computer, or OpenAI, Anthropic, Google Gemini, xAI Grok, DeepSeek, Qwen, Moonshot (Kimi), Zhipu GLM, Mistral, OpenRouter and other services with your own API key.