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About This Tool
Unix epoch timestamps represent the total elapsed time since the Unix epoch (00:00:00 UTC on January 1, 1970), excluding leap seconds. Modern databases, APIs, and logging systems store temporal data as 10-digit integers (seconds) or 13-digit integers (milliseconds) to avoid timezone serialization ambiguities.
This converter provides real-time bidirectional translation between raw epoch integers and structured date formats. It features a live ticking current epoch clock, detects whether an entered timestamp is in seconds or milliseconds, and displays corresponding UTC, ISO 8601, and local timezone representations alongside relative time distances.
For example, entering 1700000000 instantly converts to UTC date Wed, 15 Nov 2023 22:13:20 GMT, ISO 8601 timestamp 2023-11-15T22:13:20.000Z, and your browser's local timezone equivalent.
All timestamp conversions execute locally inside your web browser using JavaScript Date methods. No timestamps, server logs, or debugging data are transmitted to any server.
How to Use
- 1
View the live ticking Unix epoch clock displaying current seconds elapsed since 1970.
- 2
Enter an epoch integer (10 digits for seconds, 13 digits for milliseconds) into the timestamp input.
- 3
Or enter a human-readable date string into the date input field.
- 4
Read the synchronized UTC date string, ISO 8601 format, local timezone translation, and relative elapsed time.
Frequently Asked Questions
How can I tell if an epoch timestamp is in seconds or milliseconds?
Timestamps in seconds are currently 10 digits long (e.g. 1,700,000,000), while millisecond timestamps are 13 digits long (e.g. 1,700,000,000,000). The tool detects this automatically.
What is the Year 2038 problem?
On January 19, 2038, systems using signed 32-bit integers to store epoch seconds will overflow. Modern 64-bit systems handle timestamps billions of years into the future.
Does this conversion tool send timestamp data to an external server?
No. All date formatting and interval math runs client-side in your web browser.