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Tiktokenizer

Paid

Browser-based tokenizer explorer for LLM prompts

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Type
Saas
Company
Tiktokenizer
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About Tiktokenizer

Tiktokenizer is a platform for developers to track their users' AI tokens. It provides tools to monitor token usage, enabling developers to bill customers proportionally based on their consumption. The platform offers a REST API for tracking, reading, and refreshing user data, facilitating transparent and fair billing for AI applications.

How to Use

Use the Tiktokenizer REST API to track, read, and refresh user token data. Integrate pre-built code snippets into your project to easily monitor token usage and bill customers accordingly. The platform also offers a visualizer to track billing for each user.

Key Features

  • Token usage tracking
  • REST API for user management
  • Real-time token usage display
  • Moderations API integration
  • Pre-built code snippets
  • In-app visualizer for billing

Use Cases

  • Billing customers proportionally based on AI token usage
  • Monitoring token consumption for AI applications
  • Refreshing tokens for subscription billing cycles

Key Features

Token usage tracking
REST API for user management
Real-time token usage display
Moderations API integration
Pre-built code snippets
In-app visualizer for billing

Pros & Cons

Pros
  • Runs entirely in the browser; prompts never leave the user's device
  • Provides exact tokenization for raw tiktoken encodings (not just estimates)
  • Visual token boundaries with color coding and hoverable IDs make debugging intuitive
  • Exposes whitespace characters that are often invisible in raw text
  • Supports a range of models including GPT-5.6 and open-source tokenizers
  • Free to use with no account required
Cons
  • Does not account for chat roles, tool definitions, images, or provider templates that affect final API billing or context limits
  • Compatible encodings for open-source models are estimates, not authoritative counts from the model provider
  • Limited to text tokenization; cannot handle multimodal inputs like images
  • No built-in cost calculation based on provider pricing tiers

Best For

Billing customers proportionally based on AI token usageMonitoring token consumption for AI applicationsRefreshing tokens for subscription billing cycles

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FAQ

What is Tiktokenizer?
Tiktokenizer is a browser-based tool that counts tokens, reveals token IDs, and shows how different language models encode text. It is a measurement and debugging tool, not a language model itself.
Does Tiktokenizer send my prompts to a server?
No. All tokenization happens locally in your browser. Your text is never sent to an application server.
Which models does Tiktokenizer support?
It supports raw tiktoken encodings such as o200k_base (used by GPT-5.6) and cl100k_base. It also provides compatible views for open-source tokenizers loaded from Hugging Face, with accuracy boundaries clearly labeled.
Is Tiktokenizer accurate for billing?
For raw tiktoken encodings, the token count is exact. However, API usage may include additional tokens for chat roles, message separators, tool definitions, images, and provider templates. Always verify against the provider's API response for production billing.