Free AI Developer Tools

A collection of free tools for AI developers. Calculate tokens, estimate API costs, format prompts, and optimize your AI applications.

All Tools

Everything you need to optimize your AI development workflow. All tools are free to use and run entirely in your browser.

Calculate the estimated token count for your text. Supports multiple languages including English, Chinese, and code.

Calculate the API cost for different AI models based on input and output token counts. Compare prices across providers.

Visualize how your text is split into tokens. See the tokenization process and understand token boundaries.

Format your prompts with proper structure for system, user, and assistant messages. Improve prompt organization.

Compare two prompts side by side and highlight the differences. Perfect for tracking prompt iterations.

Compare AI model prices from OpenAI, Anthropic, Google, and more. Find the most cost-effective option.

Check if your prompt fits within the context limits of various AI models. Avoid truncation issues.

Accurate Calculations: Our token calculator uses industry-standard algorithms to provide accurate estimates for various AI models.
Cost Optimization: Compare prices across different AI providers to find the most cost-effective solution for your use case.
Privacy First: All processing happens in your browser. Your data never leaves your device, ensuring complete privacy.

Start using our free tools today and take your AI development to the next level.