Count tokens for a selected model
Choose an available model or encoding and enter text to see the resulting count. Token counts can differ between tokenizers, so select the one relevant to the API or model you plan to use.
Use the TikTokenizer Vercel App to count text tokens, choose a model or encoding, inspect tokenized output, and draft chat messages in a browser.
CategoriesAi Api
What is the TikTokenizer Vercel App?
The TikTokenizer Vercel App is a browser-based tokenizer and token-counting tool. The public interface lets visitors select a model or encoding, enter text, and inspect a token count and tokenized representation. Its interface also supports composing a chat-style prompt with message roles. What can TikTokenizer do? Count tokens for a selected model Choose an available model or encoding and enter text to see the resulting count. Token counts can differ between tokenizers, so select the one relevant to the API or model you plan to use. Inspect tokenized output The interface can display token output and offers a whitespace display option. This is useful when checking how a prompt is segmented, although the exact displayed behavior depends on the selected encoding. Compose chat messages The page includes system, user and assistant message areas and an option to add a message. That helps approximate a chat prompt before submitting it to a model. Use cases Prompt authors estimating text tokenization and developers comparing encodings before an API integration.
How to count tokens with TikTokenizer
Open the tool, choose a model or tokenizer from the selector, and paste text into the content area. Add chat messages if needed, then inspect the token count and output. Recheck against the target API because its wrapper, special tokens and request format may change the final usage.
Limitations
A browser tokenizer helps estimate text tokenization but does not guarantee the exact billed token total for every API request. System wrappers, tools, images, cached input and provider-specific processing may add tokens. Do not paste confidential prompts into a third-party page unless you have reviewed its privacy practices. Frequently asked questions
Does TikTokenizer support GPT models?
The public interface offers model and encoding selectors, and indexed examples include GPT-family models and encodings. Available options may change.
Can I use it to estimate API costs?
It can help inspect text token counts, but it is not a complete cost calculator and does not account for every provider-specific input or output charge.
Does it require an account?
No sign-in control was visible in the reviewed tool interface; check the live page for current behavior.
What can TikTokenizer do?
Inspect tokenized output
The interface can display token output and offers a whitespace display option. This is useful when checking how a prompt is segmented, although the exact displayed behavior depends on the selected encoding.
Compose chat messages
The page includes system, user and assistant message areas and an option to add a message. That helps approximate a chat prompt before submitting it to a model. Use cases Prompt authors estimating text tokenization and developers comparing encodings before an API integration. How to count tokens with TikTokenizer Open the tool, choose a model or tokenizer from the selector, and paste text into the content area. Add chat messages if needed, then inspect the token count and output. Recheck against the target API because its wrapper, special tokens and request format may change the final usage. Limitations A browser tokenizer helps estimate text tokenization but does not guarantee the exact billed token total for every API request. System wrappers, tools, images, cached input and provider-specific processing may add tokens. Do not paste confidential prompts into a third-party page unless you have reviewed its privacy practices. Frequently asked questions Does TikTokenizer support GPT models? The public interface offers model and encoding selectors, and indexed examples include GPT-family models and encodings. Available options may change. Can I use it to estimate API costs? It can help inspect text token counts, but it is not a complete cost calculator and does not account for every provider-specific input or output charge. Does it require an account? No sign-in control was visible in the reviewed tool interface; check the live page for current behavior.