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Estimate LLM token counts for prompts and text with a local browser tool.
The LLM Token Counter estimates how many tokens your text will consume in large language models. Paste a prompt and see token counts, character-to-token ratios, and estimated costs across popular models — all computed locally with a BPE-style tokenizer approximation.
Staying under context limits matters when building prompts, RAG pipelines, or chat applications. This tool helps you trim prompts before sending them to paid APIs, avoiding truncated outputs and surprise bills.
It's a close approximation using a GPT-style byte-pair encoding. Exact counts vary slightly between model families (GPT, Claude, Llama), but the estimate is typically within a few percent.