OpenWeatherMapFree REST API
7-day weather forecast, current conditions, and historical records
Developer Workbench & Live ConsoleKey Required
Test real endpoints directly, inspect live JSON, or copy implementation code.
An external API key is required to authenticate requests with OpenWeatherMap. Allowance: 1000 req/day.
Unix Timestamp & Date Converter
Convert seamlessly between Unix epoch timestamps (seconds/ms), ISO 8601, UTC and local timezones.
Test and interact with this service in your browser using our Unix Timestamp & Date Converter tool.
Frequently Asked Questions (FAQ)
Technical and integration answers for OpenWeatherMap.
All data feeds, trademarks, and documentation belong directly to the original API provider. FreeAPI serves purely as a discovery index and documentation reference for developers.
OpenWeatherMap Limitations & Free Alternatives
Mandatory credit card for One Call 3.0, 1,000 calls/day limit, and up to 2-hour activation delay on new API keys (401 Unauthorized).
Open-Meteo delivers 10,000 calls/day with zero API keys or credit cards, while WeatherAPI grants 1,000,000 calls/month.
10x higher daily limit than OpenWeatherMap, zero registration, and 16-day hourly forecasts.
1M free monthly requests (~33,000/day) bundling air quality (AQI) and astronomy telemetry.
Zero-auth high-resolution live precipitation radar, lightning telemetry, and storm warnings.
Top Alternatives in Weather & Climate
Open-Meteo
Zero registration required, 16-day forecasts, free for non-commercial applications
Visual Crossing
50-year historical weather records and global meteorological forecasts
Tomorrow.io
Advanced hyperlocal weather intelligence, wind vectors, and alert feeds
Meteostat
Open meteorological historical weather data archive and climate trends
AccuWeather
Enterprise-grade weather forecasts and high-resolution radar feeds