What is a Unix epoch timestamp?

The Unix epoch is the number of seconds that have elapsed since 00:00:00 UTC on Thursday, 1 January 1970, not counting leap seconds.

How does the tool distinguish between seconds and milliseconds?

Timestamps with more than 11 digits (greater than 99,999,999,999) are automatically detected and parsed as milliseconds, while 10-digit timestamps are treated as seconds.

What is the Year 2038 problem (Y2038)?

On January 19, 2038, 32-bit signed Unix timestamps will overflow. This tool uses modern 64-bit JavaScript floating point numbers, safely supporting dates far beyond 2038.

Are my timestamps or dates sent to a server?

No. All timestamp conversions occur locally in your browser using JavaScript native Date and Intl APIs. Zero network requests are made.

Dev Tools

Timestamp Converter

Convert Unix epoch timestamps to human dates and vice versa.

100% Private & Client-Side Execution

100% client-side calculation. Your dates, times, and timestamps never leave your device.

About Timestamp Converter

Timestamp Converter is an instantaneous bi-directional Unix epoch conversion utility for software engineers, database administrators, and system analysts. It converts numeric timestamps in seconds or milliseconds into standardized human-readable date formats (UTC, ISO 8601, RFC 2822, and local system time) and allows you to generate epoch timestamps from arbitrary dates and times with timezone controls.

How to Use Timestamp Converter

Review the real-time Unix epoch counter at the top for current epoch seconds.
Enter any numeric timestamp into the "Epoch to Human" panel to view immediate conversions across UTC, Local, and ISO 8601 formats.
Select a date, time, and timezone in the "Human Date to Epoch" panel to calculate exact epoch seconds and milliseconds.
Use quick presets like "Start of Day" or "+1 Day" to fast-forward date calculations.
Click any Copy button to quickly copy timestamps or formatted dates to your clipboard.

Common Real-World Use Cases

Backend Developers: Debug and inspect database timestamps from PostgreSQL, MongoDB, Redis, or MySQL.
API Integrators: Convert OAuth tokens, JWT expiration claims (exp, iat), and webhook payloads.
DevOps & SREs: Analyze server access logs, cron job schedules, and system event timestamps in UTC.
Data Engineers: Verify epoch conversions during ETL pipeline testing and time-series aggregations.

Technical Specifications & Limitations

Supports standard 10-digit Unix timestamps (seconds), 13-digit timestamps (milliseconds), ISO 8601 strings, and dates from 1970 through year 2100+.

Frequently Asked Questions

What is a Unix epoch timestamp?: The Unix epoch is the number of seconds that have elapsed since 00:00:00 UTC on Thursday, 1 January 1970, not counting leap seconds.
How does the tool distinguish between seconds and milliseconds?: Timestamps with more than 11 digits (greater than 99,999,999,999) are automatically detected and parsed as milliseconds, while 10-digit timestamps are treated as seconds.
What is the Year 2038 problem (Y2038)?: On January 19, 2038, 32-bit signed Unix timestamps will overflow. This tool uses modern 64-bit JavaScript floating point numbers, safely supporting dates far beyond 2038.
Are my timestamps or dates sent to a server?: No. All timestamp conversions occur locally in your browser using JavaScript native Date and Intl APIs. Zero network requests are made.

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