Gpt Tokenizer

The fastest JavaScript BPE Tokenizer Encoder Decoder for OpenAI's GPT models (gpt-5, gpt-o*, gpt-4o, etc.).

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Pricing

free

Website

gpt-tokenizer.dev

Listed

Sep 2026

Last updated: September 28, 2026

About Gpt Tokenizer

The fastest JavaScript BPE Tokenizer Encoder Decoder for OpenAI's GPT models (gpt-5, gpt-o*, gpt-4o, etc.). Port of OpenAI's tiktoken with additional features.

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