Natural Language Processing
Free
Added 21 Feb 2026
Tiktokenizer
A new browser-based tool for tokenizing text using the same algorithms as OpenAI, designed for AI researchers and prompt engineers.
tokenization
NLP
prompt engineering
AI Overview
Tiktokenizer is a browser-based tool that tokenizes text using OpenAI's tokenization algorithms, allowing users to see exactly how their prompts are split into tokens. It's designed for AI researchers and prompt engineers who need to optimize token usage, understand API costs, and fine-tune prompts for language models. The tool stands out by providing real-time tokenization in the browser with no installation required.
Features
FREE
- ✓ OpenAI-compatible tokenization
- ✓ Real-time token count visualization
- ✓ Browser-based processing
- ✓ Support for multiple token encodings
- ✓ Token-by-token breakdown view
- ✓ Copy token data to clipboard
Use Cases
- → Estimate API costs by analyzing token counts before sending prompts to OpenAI models
- → Optimize prompt length and structure to stay within context window limits
- → Debug tokenization issues when prompt behavior differs from expectations
- → Compare how different phrasings tokenize to improve prompt efficiency
- → Analyze how special characters and formatting affect token usage
Ready to try Tiktokenizer?
Visit the official site to get started.