Free AI Tools
Engineering as marketing. Every tool is free, open-source, no login required. Like what you see? Scroll down to hire me.
Claude Code Cost Estimator
Subscription vs API pay-per-token — see your real Claude Code cost, compare with Cursor and Copilot
Try it →Claude Code Skill Finder — Find the Right Open-source Skills
Tell us what you want to build. Find open-source Claude Code skills / plugins / agents on GitHub, ranked by relevance + stars. Free, no login.
Try it →MCP Config Generator — .mcp.json in one click
Pick MCP servers (Context7, GitHub, Playwright, Filesystem, and more) and get a paste-ready .mcp.json plus claude mcp add commands. Every command verified against upstream. Free, no login.
Try it →Context Budget — Estimate tokens, check the window fit
Paste a prompt, code, or docs to estimate tokens and see what % of each window (Claude 200K, GPT 128K, Gemini 1M) it fills, with a context-rot warning. In-browser estimate, free.
Try it →AI Tell Detector — Is your text AI-flavored?
Paste Chinese or English text for a 0-100 AI-tell score. Highlights 9 categories of AI signatures (templates, preachy closers, em dashes, jargon) and how to fix each. Runs in-browser, nothing uploaded, free.
Try it →VoiceBridge — Chinese Ideas to Native English Posts
Turn your Chinese ideas into platform-native English posts for X, LinkedIn, and Reddit. Cultural adaptation, not translation. Built for Chinese founders going global.
Try it →Content Repurpose Workflow
One piece of content → 6 platform versions. AI rewrites for Instagram, TikTok, YouTube, LinkedIn, Twitter, Reddit instantly.
Try it →AI API Price Calculator
Compare OpenAI, Claude, Gemini, DeepSeek pricing side-by-side. Calculate your monthly cost by token usage.
Try it →AI Roundtable Debate
Ask one question, get 4 AI agents to argue from different stances. Watch them debate, challenge, and converge on an answer.
Try it →Chinese AI Model Pricing Comparison
Doubao/DeepSeek/Kimi/Qwen/GLM/Hunyuan — API pricing + subscription plans compared side by side.
Try it →MVP Scope Planner — Cut 80% Before You Code
Paste a SaaS idea. Get a 4-week MVP plan: must-have, can-wait, cut, with no-code workarounds and hidden risks. No login, no email gate.
Try it →SaaS Feature Estimator — AI Dev Cost Calculator
Describe your SaaS idea, pick feature modules, get AI-powered time and cost estimates. $80/hr transparent rate. Free, no login.
Try it →China-US Tariff Calculator
Enter a price, instantly see tariff cost across 16 categories. Covers electronics, fashion, cosmetics, cars and more.
Try it →AI Wrong-Answer Book Generator
Snap a few worksheet photos. AI groups mistakes by topic, generates targeted practice, exports a printable PDF.
Try it →LeadPipe — Find freelance gigs while you sleep
AI scans Reddit + HackerNews 24/7, 5-tier intent classification, multi-version drafts (comment/DM/email). Daily email digest of today's top high-intent leads.
Try it →AI Sticker Maker — Turn 1 Selfie into 16 Q-Style Stickers
Upload one photo. AI generates 16 Q-style cartoon stickers, transparent background, WeChat sticker spec ready, one-click ZIP download. Free, no login.
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