Date, Time & Math
Unix timestamps, timezone converter, date diff, cron builder, number base.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Auto-detects seconds vs milliseconds. Shows ISO 8601, relative time, and all timezone representations. Also displays the current timestamp live.
Open →Cron Expression Builder
Parse, validate, and build cron expressions. Shows a plain-English description and calculates the next 5 scheduled times. Supports standard 5-field cron, AWS EventBridge cron expressions, and Quartz scheduler syntax for Java/Spring jobs.
Open →Date Difference Calculator
Date calculator — find the difference between two dates in years, months, weeks, days, hours, and minutes. Calculate your exact age, count business days, add or subtract days from a date, and set countdowns. Handles leap years and month-end edge cases correctly.
Open →Timezone Converter
Time zone converter — convert date and time between any of 60+ world time zones. Uses the IANA timezone database for accurate DST handling. Schedule international meetings, calculate UTC offsets, and convert server logs to local time.
Open →ISO 8601 Parser
ISO 8601 date and time parser — parse ISO 8601 formatted dates, datetimes (2024-01-15T14:30:00Z), durations (P1Y2M3DT4H), and intervals. Shows local time, relative time, week number, and day of year. Validates ISO 8601 compliance.
Open →Number Base Converter
Number base converter — convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Enter a number in any base and see all four representations instantly. Essential for embedded programming, color codes, and permission bit masks.
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