Time
A comprehensive collection of time-related tools including world clocks, timezone converters, timers, and calendar utilities to help you manage your time efficiently.
Stopwatch
Time
Precise timing, record time points, support full-screen mode and data export
Analog Clock
Time
Analog clock with automatic settings, can simulate examination room clock
Digital Clock
Time
Real-time display of current time, support page flipping and multiple themes
Countdown Timer
Time
Custom target time with real-time countdown reminders
World Time
Time
Real-time view of time zones around the world
Blue Hour Calculator
Time
Precisely calculate sunrise/sunset blue hour times for photography - supports any global location
Date Calculator
Time
Professional date time calculator supporting date offset, timestamp offset, interval calculation, and arithmetic with parentheses. Two-way date/timestamp input with one-click copy.
Pomodoro Timer
Time
Free online Pomodoro timer with task list and break management. Boost your productivity with this web-based focus timer - perfect for study, work, and time management. Features custom work/break durations, todo list, and pomodoro counter.
Unix Timestamp Converter
Time
Free online Unix timestamp converter supporting seconds/milliseconds timestamp to standard time conversion, datetime to timestamp, multi-timezone support (default Shanghai), real-time display of current seconds/milliseconds timestamps, and precise timestamp parsing.
Timezone Converter
Time
Professional online time zone converter supporting real-time time conversion across global time zones, automatic DST handling, timestamp input, source timezone selection, time zone filtering, working hours highlighting, and one-click copy of conversion results.
Week Number Calculator
Time
Free online week number calculator supporting ISO (Monday first) and US (Sunday first) standards. Calculate which week of the year any date falls into, display week range, total weeks in year, remaining weeks, next week number. Pure local calculation with privacy protection.
Sun Altitude Calculator - Solar Position & Sunrise/Sunset
astronomy-tool
Free online sun altitude calculator with built-in nationwide location data. Calculate solar altitude, azimuth, sunrise/sunset times, and solar noon. Pure local computation with privacy protection.
Baby Growth Calculator - Days, Weeks, Months Age Tracker
parenting-tool
Free baby growth calculator that accurately calculates days, weeks, and months since birth. Track growth stages, get zodiac signs, stage features, and personalized parenting tips. Pure local computation with privacy protection.
Age Calculator - Calculate Your Exact Age in Years, Months & Days
date-tool
Free age calculator using international chronological age standard. Get precise age (years/months/days), total days lived, zodiac sign, birth weekday, and next birthday countdown. Fully local calculation, privacy guaranteed.
Zodiac Sign Calculator - Discover Your Sun Sign & Astrology Profile | Western Astrology
divination-tool
Free zodiac sign calculator based on Western astrology solar zodiac. Enter your birth month/day to discover your sun sign (Aries to Pisces) with detailed astrology profile including element (fire/earth/air/water), ruling planet, lucky color/stone/number, personality keywords, and sign description. Fully local calculation, no data upload. Perfect for astrology enthusiasts and daily horoscope reference.
Light Year Converter - Convert Astronomical Distances | ly to km/AU/parsec/mile
astronomy-tool
Free light year converter for astronomical distance conversion. Convert light years to kilometers, meters, astronomical units (AU), parsecs, and miles. Supports bidirectional conversion with real-time calculation. Features cosmic scale perception tips, IAU standard values, and accurate astronomical unit conversions. Perfect for astronomy enthusiasts, students, and space science educators. Fully local calculation, privacy guaranteed.