Unix Timestamp Converter - Epoch Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds with automatic detection. Real-time epoch display. All processing happens in your browser.
About This Tool
The Unix Timestamp Converter is a free online tool that converts between Unix timestamps (also known as Epoch time or POSIX time) and human-readable date formats. A Unix timestamp represents the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC — known as the Unix epoch.
This tool automatically detects whether your input is in seconds or milliseconds, eliminating guesswork. It displays results in multiple formats including GMT/UTC, your local time zone, ISO 8601, and a human-friendly relative time string (e.g., "3 days ago").
A live ticker shows the current Unix timestamp updated every second, making it perfect for developers who need to copy the current epoch time on the fly. All conversions happen locally in your browser — no data is ever sent to any server.
How to Use
- Convert timestamp to date: Enter a Unix timestamp (e.g.,
1715430000) in the first input field. The converted date will appear instantly in GMT, local time, ISO 8601, and relative time formats. - Convert date to timestamp: Use the date-time picker in the second section to select a date and time. The corresponding Unix timestamp (in both seconds and milliseconds) will be generated automatically.
- Copy current timestamp: The live ticker at the top shows the current Unix timestamp. Click the Copy button next to either the seconds or milliseconds value to copy it to your clipboard.
- Copy any value: Every converted result has its own copy button. Click to copy individual values to your clipboard.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since 00:00:00 UTC on January 1, 1970 — the Unix epoch. It is widely used in programming, databases, and system logs because it provides a simple, unambiguous way to represent a point in time as a single integer. Since it does not account for time zones or daylight saving time, all timestamps are inherently in UTC.
What is the difference between seconds and milliseconds?
Unix timestamps in seconds are 10-digit numbers (e.g., 1715430000), while timestamps in milliseconds are 13-digit numbers (e.g., 1715430000000). Programming languages differ: JavaScript's Date.now()returns milliseconds, while Python's time.time()returns seconds. This tool automatically detects which format you've entered based on the number of digits and converts accordingly.
Can Unix timestamps be converted to specific time zones?
Yes. This tool displays both GMT/UTC (the universal reference) and your local time, which is automatically determined by your browser's time zone settings. If you need a different time zone, you can use the ISO 8601 output and convert it with another tool, or apply a manual offset. The ISO 8601 format includes the UTC offset, making it machine-readable and time-zone aware.
Will this tool work after the Year 2038 problem?
Yes. The Year 2038 problem only affects systems that store Unix timestamps as signed 32-bit integers (which overflow on January 19, 2038). This tool and all modern browsers use 64-bit floating-point numbers for timestamps, supporting dates billions of years into the future. Our converter correctly handles timestamps well beyond 2038.
Is my data sent to a server?
No. All conversions happen entirely in your browser using client-side JavaScript. No data — including timestamps, calculated dates, or IP addresses — is ever sent to or stored on any server. You can even use this tool offline after the page loads.