Tokenizer Playground
Real-time tokenization with popular LLM models (GPT-4, GPT-3.5, GPT-5, Claude, Llama 2, BERT, T5). Experiment with different tokenizers, view token statistics, and estimate costs.
OpenAI GPT-4 and GPT-3.5 tokenizer (tiktoken)
TOKENS
0
CHARACTERS
0
WORDS
0
EST. COST
$0.0000
How to use:
- • Select a tokenizer from the dropdown (GPT-4, Claude, Llama 2, etc.)
- • Type or paste text in the input field to see real-time tokenization
- • View token statistics including count, characters, words, and estimated cost
- • Switch between Text, Token IDs, or Hide display modes
- • Copy tokenized text to clipboard
- • Export results as JSON for analysis
- • Compare different tokenizers on the same text
About Tokenization
This playground provides simplified tokenization for educational purposes. Real LLM tokenizers use more sophisticated algorithms and vocabulary files. The cost estimates are approximate and based on typical pricing for each model.