A speed reading app that uses rapid serial visual presentation (RSVP) to help you read faster. Paste text or enter an article URL, and WordFlash extracts the content and displays it one word at a time with a focal character (the red letter) to guide your eyes.

Built with Next.js, React, and Tailwind CSS.

• Focus-based reading — Each word highlights a focal character (configurable color) to reduce eye movement and increase reading speed
• Article extraction — Enter any URL; Mozilla Readability strips ads and clutter, leaving clean article content
• Reader view — Read articles with the speed reader panel and full article side-by-side; click any word to jump
• Bookmarklet — Drag "Read in WordFlash" to your bookmarks bar to open any article from any page
• Customizable — Font size, font family, words per minute, pause durations (sentence ends, commas), theme (light/dark/system)
• Accessibility — Reduce motion and reduce transparency options
• Reading position — Resumes where you left off when you return

wordflash/
├── apps/
│   └── web/          # Next.js web app
├── packages/
│   └── core/         # Shared logic: word timing, text preprocessing, focal character index
└── package.json      # Bun workspaces monorepo

• Bun (recommended) or Node.js 18+

bun install

bun run dev

Open http://localhost:3000. The app hot-reloads as you edit files.

For watch mode during development, run tests from a specific package:

cd packages/core && bun run test:watch
cd apps/web && bun run test:watch

bun run build
bun run --filter wordflash start

The easiest way to deploy is with the Vercel Platform. See the Next.js deployment docs for details.

Monorepo setup: In your Vercel project settings, set Root Directory to apps/web so Vercel builds and deploys the Next.js app from the correct location.