Real-time ambient noise measurement via browser microphone. Animated visual indicator and geolocation.
Open →Current time in multiple world cities: Bogotá, Geneva, Nairobi, Delhi, Manila and more.
Open →25-minute countdown with audio alert. Pomodoro technique for focused work sessions.
Open →Draws random alphabet letters without repeating, timing each selection. Great for board games or workshops.
Open →10,000 uniquely shuffled numbers, paginated 50 at a time. Useful for draws and raffles.
Open →Three modes in one tool: single URL, contact vCard, and bulk generation from lists (Excel/CSV). Exports to Word.
Open →Paste an API URL with optional headers and explore its JSON structure as an interactive tree. Auto-detects IDs and foreign keys.
Open →Load your own terms and look them up later. Stored in local files.
Open →Visualize the Solar System at true scale on an OpenStreetMap. Choose from multiple center points (Maloka, Medellín Planetarium, CERN and more).
Open →Leaflet map of points of interest. In development — sample locations pending customization.
Open →Experimental version with CSV data for celestial bodies and nearby stars on OpenStreetMap.
Open →Luis Hernando Aguilar · tools.luishernando.co · 2026