Date & Time Tools - Free Online Tools

Convert timestamps, work with timezones, calculate date differences, and handle time duration math. Essential tools for developers working with dates, times, and scheduling across different timezones and formats.

All calculations happen in your browser. No server calls, no data sent anywhere.

Available Tools

TIME

Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports both seconds and milliseconds precision. Features a live-updating current timestamp display.

TZ

Timezone Converter

Convert time between different timezones. Input time in one timezone and see equivalent times in other timezones instantly.

DATE

Date Calculator

Add or subtract days, weeks, months, and years from dates. Calculate the difference between two dates in multiple formats.

TIME

Duration Calculator

Calculate the duration between two dates and times. Output in days, hours, minutes, and seconds.

Why Use Date & Time Tools?

Working with dates and times is surprisingly complex. Timezones, daylight saving time, different date formats, and timestamp conversions create constant friction in development.

These tools handle the complexity for you. Converting a Unix timestamp to a readable date shouldn't require writing code. Figuring out what time a meeting is in another timezone shouldn't involve mental math. Calculating how many days between two dates should be instant.

Whether you're debugging API responses with timestamps, scheduling across timezones, or just trying to understand when something happened, these tools give you immediate answers.

Common Use Cases

  • • Converting Unix timestamps from API responses to readable dates
  • • Figuring out what time a meeting is in different timezones
  • • Calculating how many days until a deadline or since a launch
  • • Converting between timestamp formats (seconds vs milliseconds)
  • • Debugging date-related bugs by seeing exact timestamp values
  • • Scheduling across multiple timezones for distributed teams
  • • Calculating time durations for billing or time tracking
  • • Converting dates for internationalization work
  • • Planning project timelines with date arithmetic

Related Categories: Calculators | Converters | Developer Utilities