🧰 Free AI Tools
Token counting, API costs, context windows, local VRAM, prompts and rule files — the small tools developers and heavy AI users actually need.
19 live · 0 planned · more added weekly
Looking for something specific? Use site search (⌘K)
Tokens & CostToken 与成本5
Token Counter
Instant token estimates for Chinese/English text and code, converted per model.
LLM API Cost Calculator
Enter your usage, compare monthly API costs across models.
Tokenizer Visualizer
See exactly how your text is split into tokens, highlighted piece by piece.
Context Window Visualizer
Which model fits your document? Compare context windows at a glance.
LLM Comparison Table Generator
Pick models, copy a ready-to-share Markdown comparison table.
Developer开发者4
AGENTS.md Generator
Generate project rule files for Cursor, Claude Code and other coding agents.
llms.txt Generator
Fill a form, download a machine-readable llms.txt for your site.
RAG Chunk Previewer
Preview text chunking with per-chunk token estimates for your RAG setup.
Function Calling Schema Generator
Define functions visually, export OpenAI/Claude function calling schemas.
Local Deployment本地部署1
Prompts提示词3
Prompt Generator
Assemble high-quality bilingual prompts from role, task, format and constraint blocks.
Midjourney Prompt Builder
Build Midjourney & Stable Diffusion prompts from style, light and lens tags.
Prompt Diff
Highlight differences between two prompt versions to iterate faster.
Choosing选型决策3
Detection检测1
Marketing营销2
Looking for an in-depth review? Browse 376 AI tools
Browse the AI tools directory →