Free Unix Timestamp Converter
Instantly convert Unix epoch timestamps to human-readable dates, or parse date strings into timestamps. Supports both seconds and milliseconds, with ISO 8601, UTC, local time, and relative output.
What is a Unix Timestamp?
A Unix timestamp (also called epoch time) is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC — known as the Unix epoch. It is a simple, timezone-agnostic way to represent a moment in time, widely used in programming, databases, and APIs.
For example, the timestamp 1705305000 represents 2024-01-15T07:30:00Z. Many systems also use millisecond precision (multiply seconds by 1000), which this tool auto-detects.
How to Use
- Timestamp → Date: Enter a Unix timestamp in seconds (e.g.
1705305000) or milliseconds (e.g.1705305000000). Click Convert or pressCmd/Ctrl + Enter. - Date → Timestamp: Enter any date string such as
2024-01-15,2024-01-15T08:30:00Z, or even a natural format likeJan 15, 2024. - Click Now to use the current date and time.
- Hover over any result row to copy it instantly.
Output Formats Explained
| Format | Example | Description |
|---|---|---|
| Unix (s) | 1705305000 | Seconds since epoch (UTC) |
| Unix (ms) | 1705305000000 | Milliseconds since epoch |
| ISO 8601 | 2024-01-15T07:30:00.000Z | International standard, preferred for APIs |
| UTC | Mon, 15 Jan 2024 07:30:00 GMT | RFC 2822 / HTTP date format |
| Local | 01/15/2024, 03:30:00 AM EST | Browser's local timezone |
| Relative | 3 months ago | Human-friendly relative time |
Frequently Asked Questions
Seconds vs milliseconds — how do I know which I have?
A 10-digit number is almost certainly seconds (valid through year 2286). A 13-digit number is milliseconds. This tool automatically detects the precision — values greater than 10¹² (1 trillion) are treated as milliseconds.
What is the maximum Unix timestamp?
The maximum 32-bit signed integer Unix timestamp is 2147483647, representing January 19, 2038 — the famous Year 2038 problem. Modern systems use 64-bit timestamps (or milliseconds) to avoid this.
Is my data private?
Yes. All conversions run locally in your browser. No data is sent to any server.