Build a Real-time Currency Converter
Create a fast and responsive web app where users can convert between multiple currencies using live exchange rates fetched dynamically from a currency API.Currency converters are highly practical and a great way to practice API integration, dynamic form handling, unit conversions, and real-time data updates — all essential skills for financial and travel-related web apps.
Users can select source and target currencies, input an amount, and instantly see the converted value based on live market exchange rates.
Live Exchange Rate Fetching
Use a real-time currency API to fetch the latest forex rates and ensure conversions are up to date.
Source and Target Currency Selectors
Dropdowns for users to select from currencies like USD, EUR, INR, GBP, JPY, etc.
Instant Conversion on Input
As users enter the amount or change currencies, show converted results immediately without page reloads.
Optional: Swap Currencies
Add a swap button that quickly switches source and target currencies for convenience.
The app fetches live exchange rates from a currency API. When users input an amount and select currencies, it multiplies based on the current rates and displays real-time conversion results instantly.
- User selects the 'From' and 'To' currencies using dropdowns.
- User enters an amount in the input field.
- Live conversion is displayed immediately based on fetched exchange rates.
- Optional: Allow reverse conversion with a swap button for quicker recalculations.
- Optional: Display small conversion history or recent conversions (localStorage).
Frontend
Next.js, React.js, Tailwind CSS for dynamic forms, responsive design, and smooth user input experience
API Integration
ExchangeRate-API, Currencylayer, or Free Forex APIs for fetching live currency conversion rates
State Management
React Context, SWR, or React Query for real-time data management and quick updates without refresh
Optional
localStorage for saving recent conversions, loading spinners for API fetch states, and dark mode support
1. Connect to a Live Currency API
Fetch available currency symbols and exchange rates using a simple public currency API.
2. Create Form for Amount and Currency Selection
Allow users to select currencies and input amount dynamically with real-time feedback.
3. Calculate and Display Conversion
Perform currency conversion math instantly based on live rates and user input.
4. Add UX Enhancements
Add swap button, loading states, error handling if API fails, and optional conversion history features.
5. Optimize and Deploy
Polish responsive design, optimize API usage, and deploy your app using Vercel, Netlify, or your preferred hosting.
Ready to Build a Powerful Currency Converter?
Build your Real-time Currency Converter today — help users convert currencies instantly, explore exchange rates live, and experience seamless conversions!
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