Token counter for LLM prompts and documents
Token Counter Tool
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Deepen your understanding of LLM tokens, optimization techniques, and best practices.
PDF to Markdown for LLMs: Why Your PDF Costs 3x More Than It Should
Sending a PDF straight to an LLM can cost several times what the same content costs as Markdown. Here's why, which converter to use, and when to skip conversion entirely.
Read article →What Are LLM Tokens? How AI Models Actually Count Your Text (2026)
What a token really is, why the same sentence costs different amounts on ChatGPT, Claude, and Gemini, and how to read 2026's pricing and context-window numbers.
Read article →What Is a Context Window? Why 1M Tokens Doesn't Mean 1M Usable Tokens
Context windows hit 1M tokens in 2026 — but research across 18 frontier models shows accuracy collapses long before the limit. What the number means, and what it doesn't.
Read article →Want to calculate tokens in your own prompts? Use our free token counter above to get instant, accurate results.