Misc Tools
AI helpers, tokens, and other utilities.
Free online AI and utility tools including token counters, AI cost calculators, prompt optimizers, and prompt library managers. Count tokens before sending to an LLM, estimate API costs, and build structured system prompts — all client-side, no sign-up, works offline.
Showing 9 of 9 misc tools
Token Counter
Estimate token counts for text (rough LLM tokenizer heuristic).
AI Cost Calculator
Estimate LLM API costs across models for any usage volume.
Prompt Optimizer
Score and improve LLM prompts with actionable suggestions.
Prompt Variable Replacer
Fill {{variables}} in prompt templates with live preview.
System Prompt Generator
Build structured system prompts for LLMs with presets.
AI Persona Generator
Design detailed AI personas with traits and system prompts.
Prompt Library
Browse, save, and manage curated LLM prompts with import/export.
Prompt Version Manager
Track prompt versions with diff, restore, and export.
AI Workflow Builder
Design multi-step AI workflows with a visual flow diagram.