I'm EthanYu

What I'm Building

Creating tools and templates to help developers ship faster - from SaaS starters to AI-powered solutions.

• EthanYu Blog

  Personal blog of Ethan Yu, sharing indie development journey, technical insights, and thoughts about the nomadic dev life. Focused on SaaS products and developer tools.

  indie hacking

  full-stack development

  SaaS

  developer tools

  Next.js

• PromptKit

  Help developers quickly generate project documents (such as requirements documents, architecture documents, and technology stack documents) required for AI development, allowing AI programming assistants (Cursor, Windsurf, etc.) to better understand the project context and provide more accurate code suggestions.

  Documentation

  AI Tools

  Developer Tools

  Project Management

  API Documentation

• TradingLens

  Professional stock market intelligence platform combining real-time market overview, AI-powered stock analysis, and smart portfolio tracking. Trusted by 10,000+ professional investors to make informed investment decisions and consistently beat the market.

  stock analysis

  AI stock analysis

  stock market intelligence

  portfolio tracking

  market overview

• BirthdayWishes

  AI-powered personalized birthday card generator with custom images and heartfelt messages. Create unique birthday wishes that make every celebration special and memorable.

  AI

  Birthday Cards

  Greeting Cards

  Personalized Cards

  AI Image Generation

• YoutubeToMp3

  Fast, free, and high-quality YouTube to MP3 converter. Convert YouTube videos to MP3 audio files quickly and easily. No registration required, completely free to use.

  YouTube to MP3

  YouTube Converter

  MP3 Converter

  Video to Audio

  YouTube Downloader