Tokenizer playground
Browser tokenizer
Paste text, choose an LLM tokenizer, and compare token counts and token splits entirely in your browser.
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Online tokenizer comparison for LLM text
This browser tokenizer shows how byte-pair encodings split text. Use it to inspect prompt tokenization, compare model-family behavior, copy token IDs, and learn whitespace, punctuation, emoji, code, or multilingual text changes the count.
Tokenization runs client-side. No input data is ever sent to an external server.