Templates
Each template is a complete, working app. Pick one, paste the prompt into a coding agent, and it builds a customized version for you in minutes.
Shared Todo List
A collaborative task list where everyone can add, complete, and manage tasks together. Share the link and start collaborating instantly.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=shared-todo and build me a shared todo list
Landing Page + Waitlist
A beautiful product launch page with email signup. Collect interest before you build. Customizable hero, features section, and call-to-action.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=landing-waitlist and build me a landing page with waitlist
Hangman
Classic word guessing game with a visual hangman drawing. Solo play or pass-and-play with friends. Built-in word list with categories.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=hangman and build me a hangman game
Trivia Night
Host creates questions, friends join with a code, everyone answers in real time. Live scoring and final leaderboard. Like Kahoot, but yours.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=trivia-night and build me a trivia night game
Voting Booth
Create a poll in seconds, share the link, and watch votes come in with live results. Great for group decisions, event planning, or just for fun.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=voting-booth and build me a voting booth
Paste Locker
A secure pastebin with password protection and burn-after-read. Uses server-side functions for bcrypt hashing — your password never touches the browser.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=paste-locker and build me a paste locker
Micro-Blog
Short-form posts with image uploads. Public feed, authenticated posting, vanity subdomain.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=micro-blog and build me a micro-blog
Photo Wall
Curated photo gallery with lightbox. AI-generated art wall. Auth-gated uploads.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=photo-wall and build me a photo wall
Secret Santa
Anonymous gift exchange with server-side matching and in-app reveal. Create a group, share a join code, draw names.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=secret-santa and build me a secret santa app
AI Sticker Maker
Generate AI sticker images from text prompts. Public gallery with likes. Browse everyone's creations.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=ai-sticker-maker and build me an AI sticker maker
Flash Cards
Study decks with spaced repetition. Create, share, and clone decks. Personal decks with optional public sharing.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=flash-cards and build me a flash cards app
Bingo Card Generator
Host custom bingo games. Players join with a code and get unique cards. Auto-detect bingo.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=bingo-card-generator and build me a bingo card generator
Memory Match
Card flip matching game with AI-generated art and leaderboard. Multiple difficulty levels.
Paste this into a coding agentCoding agents can create files, run commands, and make API calls.
✓ Claude Code, ChatGPT Codex, Cursor, Windsurf
✗ ChatGPT chat, Claude chat, Gemini chat:
Fetch https://bld402.com/build/step/1?template=memory-match and build me a memory match game
Don't see what you need? Copy this into your coding agent and describe what you want to build:
Fetch https://bld402.com/build/step/1 and follow the instructions on that page