Timestamp Converter – Unix Time Converter Online

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

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Features

🔄

Bidirectional Conversion

Enter a timestamp to get the date, or enter a date to get the timestamp. Switch anytime.

⏱️

Sec & Milliseconds

Auto-detects whether your timestamp is in seconds or milliseconds. Toggle manually if needed.

📅

Current Timestamp

One-click button to insert the current Unix timestamp with live updating display.

🔒

Privacy First

All conversion is local in your browser using JavaScript Date API.

🕐

Relative Time

Shows how long ago or how far in the future the timestamp is relative to now.

📋

Copy Options

Copy as seconds, milliseconds, or ISO string format.

How to Use

1

Choose Input Type

Select whether you're entering a timestamp or a date.

2

Enter Value

Type the timestamp or select a date from the date picker.

3

View Conversion

The converted value appears instantly with multiple format options.

4

Copy

Copy in your preferred format: seconds, milliseconds, or ISO 8601.

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's a common way to represent dates in computing.
What's the difference between seconds and milliseconds?
Unix timestamps in seconds are traditional (e.g., 1704067200). Millisecond timestamps are 1000x larger (e.g., 1704067200000). JavaScript uses milliseconds; many APIs use seconds.
How do I get the current timestamp?
Click the 'Now' button to insert the current Unix timestamp. It updates live every second.
What is the valid range for timestamps?
JavaScript Date supports dates from approximately 275,760 years in each direction. However, Unix timestamps in seconds overflow at 32 bits (Year 2038 problem for 32-bit systems).
Is my data sent to a server?
No. All conversion is done locally in your browser using JavaScript's Date object. No network requests are made.

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