Free OG Image Generator

A creative toolbox featuring shadow, SVG, gradient, and background pattern generators, color. Open-source, fast, and made for builders.

Build and grow your app business The world's best apps use RevenueCat to power purchases, manage customer data, and grow revenue on iOS, Android, and the web.

Free day number and week number calculator. Calculate what day of the year it is, ISO 8601 week numbers, days between dates, and time zone-based calendars. Embeddable widgets available.