Uptool

Apps hub

Pick an app: shareable tools, multiple languages, no sign-in.

  • Open app

    Date calculator

    Add or subtract days, compare two dates, optional time zones, client-side with shareable URLs.

    CalendarTime zoneShareable linkMultiple languagesFree
    Open app
  • Open app

    Time zones

    World clock with a synced timeline and a clickable world map (Leaflet + tz-lookup), shareable URLs.

    Time zoneMapShareable linkMultiple languagesFree
    Open app

About Uptool

Free to use

Every app listed here is free: no paywall, no account. Open a tool and get to work.

Uptool hosts small, focused web utilities. The date calculator suite adds or subtracts days, compares two dates with optional time zones, and keeps your choices in the URL for sharing. The time zones app offers a World Time Buddy-style world clock and an interactive map (Leaflet + OpenStreetMap) with tz-lookup. More apps will appear here over time. Use the filters above to explore.