What is Unix/Epoch time?

Epoch time counts seconds since 1 January 1970 UTC.

Does the converter support milliseconds?

Yes. Enter milliseconds or click the current timestamp to work with ms precision.

Can I switch between local and UTC?

Yes. The converter shows both your local timezone and ISO 8601 UTC formats.

Can I convert future or past dates?

Yes, enter any timestamp or pick a date and the converter shows the matching epoch value regardless of direction.

Is there a quick way to copy the results?

Use the copy buttons beside each field to send the formatted time straight to your clipboard.

Epoch and Unix time converter

Convert timestamps to human-readable dates and back. Supports seconds or milliseconds with local and UTC output.

Local time ISO 8601 UTC

What is Unix time?

Unix time, also called epoch time, is a linear count of seconds since 1 January 1970 00:00:00 UTC. Because it ignores time zones and daylight-saving adjustments, it is the foundation for timestamps in APIs, databases, and operating systems.

Key properties

Unix time ignores leap seconds, so official clocks occasionally pause to realign.
Most APIs use milliseconds (ms) or seconds (s). HashyTools accepts both.
64-bit epoch values handle dates well beyond the year 2038.
It is timezone-agnostic—display layers decide how to localize.

Common conversions

Operation	Formula
Seconds → milliseconds	`ms = seconds × 1000`
Milliseconds → ISO 8601	`new Date(ms).toISOString()`
Date to epoch (JavaScript)	`Date.parse('2025-01-01T00:00:00Z') / 1000`

Conversion playbook

Use the tool for quick lookups, then integrate these approaches when you need timestamps inside scripts or automation pipelines.

API debugging

Paste token expiration claims or webhook timestamps to verify whether they fall before or after your current time in UTC and local zones.

Database migrations

Confirm conversions between integer epoch columns, SQL datetime types, and application-level timezones before running data migrations.

Scheduler logs

Translate cron execution times into local business hours so on-call teams instantly understand incident windows.

Quick question

Are you converting timestamps for logs, databases, or APIs? Use the converter above to switch between epoch values and ISO dates.

Epoch converter FAQ

What is Unix or epoch time?

Epoch time counts seconds since 1 January 1970 00:00:00 UTC. It is a timezone-neutral representation commonly used in APIs and databases.

How can I convert between seconds and milliseconds?

Divide millisecond values by 1,000 to obtain seconds, or multiply seconds by 1,000 for millisecond precision. The converter accepts either format automatically.

Why do I see different results for local time and UTC?

Local output applies your system's timezone and daylight-saving adjustments, while UTC shows the underlying absolute reference used in distributed systems.

What is the Year 2038 problem?

Systems that store epoch time as a 32-bit signed integer will overflow on 19 January 2038. Modern applications use 64-bit values, but legacy software may still need remediation.

Does the converter send my timestamps to a server?

No. HashyTools performs all conversions in your browser so sensitive dates never leave your device.