Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds.

Current Unix Time
1773989394
Unix → Date
Date → Unix

What is a Unix Timestamp?

A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC, also known as the Unix epoch. It is the standard time representation in APIs, databases, and server logs because it is timezone-independent and easy to compare arithmetically.

Seconds (10-digit)
1710000000
→ 2024-03-09 16:00:00 UTC
Milliseconds (13-digit)
1710000000000
→ 2024-03-09 16:00:00.000 UTC

Key Features

✓Unix → Date — Convert any Unix timestamp into UTC, local, ISO 8601, and relative formats
✓Date → Unix — Pick a date/time and get the seconds and milliseconds timestamps instantly
✓Seconds / Milliseconds — Toggle between 10-digit and 13-digit timestamp formats
✓Live clock — Current Unix timestamp displayed in real time with copy support
✓Relative time — See how long ago or in the future a timestamp is at a glance
✓100% client-side — No data is sent to any server

How to Use the Timestamp Converter

  1. 1Unix → Date: Type or paste a Unix timestamp into the left panel. Toggle the Milliseconds switch if it is a 13-digit value.
  2. 2Date → Unix: Use the date picker in the right panel to select a date and time. Seconds and milliseconds outputs appear instantly.
  3. 3Use the live clock: Click Use next to the live timestamp display to load the current time into the Unix → Date converter.
  4. 4Copy results: Click any copy button next to UTC, local, ISO, relative, seconds, or milliseconds values.

Example Conversions

Unix → Date

Input1710000000
UTC2024-03-09 16:00:00 UTC
ISO2024-03-09T16:00:00.000Z
Relativeabout 1 year ago

Date → Unix

Input2024-03-09 16:00
Seconds1710000000
Milliseconds1710000000000

Common Use Cases

API Development

Convert timestamps when sending or receiving API data and verifying time-based fields like created_at or expires_at.

Debugging Logs

Instantly decode raw timestamps in server logs, error reports, and monitoring dashboards.

Database Handling

Verify timestamp values stored in databases and convert them for display or comparison.

Scheduling Systems

Convert timestamps for cron jobs, task schedulers, or event triggers.

Timezone Debugging

Compare UTC vs local time to track down off-by-one-hour bugs in time-sensitive logic.

Expiry & TTL Checks

Verify that token expiry times, cache TTLs, or session expirations fall at the expected moment.

Benefits for Developers

  • →Instant readability: Convert opaque numeric timestamps into human-readable dates without mental arithmetic.
  • →Multiple output formats: UTC, local, ISO 8601, and relative time all shown at once.
  • →Millisecond support: Handles both 10-digit (seconds) and 13-digit (milliseconds) timestamps.
  • →Live current time: Always know the current Unix timestamp for testing and documentation.
  • →No manual calculations: No more dividing by 1000 or reaching for Python to decode a date.
  • →Works offline: Entirely browser-based — works without internet access once the page is loaded.

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC. It is the standard way to represent time in most programming languages and APIs.

What is the difference between seconds and milliseconds timestamps?

A seconds timestamp is 10 digits long (e.g. 1710000000). A milliseconds timestamp is 13 digits long (e.g. 1710000000000). Milliseconds provide higher precision and are used in JavaScript and many modern APIs.

Does timezone affect Unix timestamps?

No. Unix timestamps are always defined in UTC. The timezone only affects how the timestamp is displayed as a human-readable date.

Is this tool safe to use?

Yes. All conversions happen entirely in your browser. No data is transmitted to any server.

Is this tool free?

Yes. The Timestamp Converter on NexoraTools is completely free with no sign-up or restrictions.