Time
Deadlines, dates, and business days.
Business-day calculator
Convert “N business days” into a real date. Add holidays. Clear rules.
Guitar Practice
Metronome, practice timer, chord cheatsheet, and simple local practice log.
Timestamp converter
Convert Unix timestamps ↔ datetime. Supports seconds/milliseconds and UTC/local display.
Epoch converter
Convert Unix epoch ↔ datetime with auto-detect (seconds/milliseconds). Shows UTC/local and a relative “from now” hint.
Cron parser
Parse a 5-field cron expression locally and preview the next run times (local or UTC). Copy results or share a link.
Notice period end date calculator
Calculate when a notice period ends (calendar days, business days, weeks/months) with weekends + holidays and explicit counting rules.
Timezone overlap planner
Pick a date and 2–6 timezones, set each person’s availability window, and find the best overlap time. DST-aware and shareable.
Time block planner
Turn a task list into a time-block schedule: start time + tasks (minutes) → blocks you can copy/share. MVP, browser-only.
Time zone difference
See what time it is in two time zones, the difference at that moment (DST-aware), and convert a specific time between zones. Shareable, browser-only.
Working days between dates
Count working days between two dates with explicit weekend rules and an optional holidays list. Choose whether to include start/end. Shareable, browser-only.
Countdown (time until a date-time)
Count down to a target date/time in a chosen time zone (DST-aware). Shows the exact target moment and a copyable summary. Shareable, browser-only.
Sleep cycle calculator
Pick a wake-up time (or bed time) and get recommended options based on a fall-asleep buffer and ~90-minute sleep cycles. Shareable, browser-only MVP.
Date add/subtract calculator
Add or subtract days/weeks/months/years from a date. Optional business-day mode (skip weekends + custom holidays). Shareable, browser-only MVP.
Meeting time poll (simple)
Paste time options, mark your availability (yes/maybe/no), then copy a clean summary to send to the group. Shareable, browser-only MVP.
Pomodoro timer
A simple Pomodoro timer with custom work/break lengths, optional beep, and shareable links. Browser-only MVP.
Snowflake ID decoder
Decode 64-bit Snowflake IDs locally: extract the embedded timestamp and bit fields. Includes Twitter/X and Discord presets, plus custom layouts. Copy/share results. Browser-only MVP.
Age calculator
Calculate age (years, months, days), total days, and days until next birthday. Shareable link. Browser-only MVP.