Learn how Gemini tokenizes text, images, audio, video and PDFs, and how to count tokens locally or through the Gemini API.

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This article explores how Gemini tokenizes data and demonstrates how to count or estimate tokens locally. You'll learn how to use the local tokenizer to estimate text token counts offline, understand the tokenization math for multimodal inputs (images, audio, video, PDFs), and see how to retrieve precise token usage metadata from API responses for accurate tracking and billing.