Claude Tokenizer

Count tokens for Claude models with precision and ease

Select Claude Model

Model ID: claude-opus-4-1-20250805

System Prompt (Optional)

System prompts help set the context and behavior for the model

Text to Tokenize

Characters: 0

Upload File (Optional)

Click to upload a file or drag and drop

Supports text files, code files, and common document formats

Maximum file size: 6MB

Content Statistics

Total Characters

Content Size

0.00MB

System Prompt

Initial Estimate

Rough estimate only!

📝 Note: The "Initial Estimate" above is a rough approximation (4 characters per token). Click "Get Exact Token Count" below for the precise token count using the actual Claude tokenizer.

Click the button above to get the precise token count using Claude's actual tokenizer

Built with Next.js and the Anthropic API •API Documentation