CoinPeek - Bitcoin Price Badge & Gas Tracker

Real-time BTC & ETH prices on badge, gas fees, and converter. Fast & lightweight.

CoinPeek - Your lightweight crypto companion for Chrome Track Bitcoin and Ethereum prices in real-time without leaving your browser. CoinPeek is designed for traders, developers, and crypto enthusiasts who need quick access to market data. KEY FEATURES: Live Price Tracking - Real-time Bitcoin and Ethereum prices - 24-hour price change with visual indicators (green/red) - Price displayed in extension badge for instant visibility Network Fee Monitoring - Ethereum gas fees (low, standard, fast) - Bitcoin transaction fees in sat/vB - Multiple API sources for reliability Quick Converter - Convert between BTC, ETH, and USD instantly - Swap currencies with one click - Precise decimal calculations PERFORMANCE: - Updates every 60 seconds automatically - Smart caching reduces API calls by 70% - Lightweight design - minimal memory footprint - Instant popup loading with cached data PRIVACY-FIRST APPROACH: - All data stored locally on your device - No account required - No personal data collected - No tracking or analytics - Open source on GitHub PERMISSIONS EXPLAINED: We only request what's absolutely necessary: - Storage: Save cached prices locally for faster loading - Alarms: Schedule background price updates We do NOT access your browsing history, tabs, cookies, or any personal data. DATA SOURCES: - CoinGecko: Cryptocurrency prices (public API) - Blocknative: Ethereum gas fees - Mempool.space: Bitcoin fees (with fallbacks) PERFECT FOR: - Crypto traders monitoring market movements - Developers checking gas fees before deploying - DeFi users optimizing transaction timing - Anyone interested in cryptocurrency prices TECH SPECS: - Built with Manifest V3 (latest Chrome extension standard) - Vanilla JavaScript - no heavy frameworks - Service Worker architecture for efficiency - Responsive modern UI with dark theme Open source and free forever. Check out our GitHub for the full source code.