All Time Tools

42 free browser-based tools for timestamps, timezones, cron expressions, date math, ML training visualization, and language references. No sign-up, no tracking.

Built by Michael Lip

Epoch & Timestamp Converters

Convert between Unix epoch timestamps and human-readable dates in multiple formats.

Epoch Converter Unix timestamp to date and back Unix Timestamp Converter Convert Unix timestamps online Date to Epoch Convert any date to epoch seconds Epoch to Date Convert epoch to readable date Milliseconds Converter Convert ms timestamps to dates Unix Time Now Live current Unix timestamp

Timezone Converters

Convert time between any two timezones with automatic DST handling.

Timezone Converter Convert between any two timezones UTC Converter UTC to any local timezone PST to UTC Pacific Time to UTC EST to UTC Eastern Time to UTC CET to UTC Central European Time to UTC IST to UTC India Standard Time to UTC JST to UTC Japan Standard Time to UTC GMT Converter GMT to local time AEST to UTC Australian Eastern Time to UTC UTC to PST UTC to Pacific Time UTC to EST UTC to Eastern Time UTC to CST UTC to Central Time UTC to IST UTC to India Standard Time UTC to GMT UTC to Greenwich Mean Time IST to EST India to Eastern Time

Cron Expression Tools

Build, test, and understand cron expressions with interactive builders and translators.

Cron Builder Build cron expressions visually Cron to English Translate cron to plain English Next Run Calculator See next 5 scheduled run times Crontab Reference Crontab syntax guide and tester Cron Job Generator Generate cron jobs for Linux

Date Math Calculators

Calculate differences between dates, add or subtract days, and count business days.

Days Between Dates Calculate exact days between dates Age Calculator Calculate exact age from birthdate Add/Subtract Days Add or subtract days from a date Business Days Count weekdays between dates Weeks Between Dates Calculate weeks between dates Week Number ISO 8601 week number for any date Day of Year Ordinal day number (1-366) Countdown to Date Live countdown to any future date Work Hours Calculator Calculate working hours between times

Machine Learning Tools

Visualize training runs, plan hyperparameter searches, and compare optimization strategies — all in the browser.

Training Progress Visualizer Plot loss, accuracy & LR curves; detect overfitting Hyperparameter Search Tool Grid, Random & Bayesian search comparison

Language Timestamp References

Copy-paste code snippets for getting and converting timestamps in popular programming languages.

Python Timestamps time.time(), datetime, strftime JavaScript Timestamps Date.now(), toISOString(), Intl Java Timestamps Instant, LocalDateTime, ZonedDateTime PHP Timestamps time(), strtotime(), DateTime Go Timestamps time.Now().Unix(), Parse, Format