Timestamp Converter: Unix, UTC & Time Zones

Official Free Tool by OpenMax

Convert Unix timestamps, milliseconds, UTC, and local time in one place

A free online timestamp converter for seconds, milliseconds, date to timestamp, timestamp to date, UTC conversion, time zone conversion, batch conversion, time range calculation, JSON time extraction, and local history.

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Live Clock

Current Local Time

Live refresh. Copy values from the cards below.

Need more than a timestamp converter? OpenMax helps teams build AI agents, workflow tools, calculators, and customer-facing utilities for real business use cases.

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Local Time

UTC Time

Seconds Timestamp

Milliseconds Timestamp

Module 02

Smart Time Converter

Enter a 10-digit seconds timestamp, a 13-digit millisecond timestamp, a date string, or an ISO time.

Auto detection: waiting for input

Smart Input

Target time zone

Conversion Result

Enter a time value to show local time, UTC time, target time zone, seconds timestamp, milliseconds timestamp, and relative time.

Module 03

Batch Time Conversion

Enter one timestamp or date per line.

Batch Input

Batch Result

Module 04

Time Range Calculator

Enter a start time and an end time, then calculate the difference.

Runs after click

Start Time

End Time

Module 05

JSON Time Field Extractor

Paste an API response or log JSON to extract common time fields.

JSON / Log Content

Extraction Result

Use Cases

Who can use this timestamp tool?

Use timestamp conversion to verify time fields across development, operations, analytics, and product workflows.

Build Similar Tools with OpenMax ->

Developers

Convert timestamps from logs, APIs, databases, webhooks, and backend debug output.

Operations teams

Check campaign windows, event schedules, launch times, and cross-time-zone deadlines.

Data teams

Clean timestamp fields from JSON exports, tracking data, spreadsheets, and analytics logs.

SaaS teams

Verify timestamps in product events, billing records, scheduled jobs, and cross-region integrations.

Module 06

Local History

The latest 12 conversions are saved only in this browser localStorage.

Official OpenMax Tool

This free timestamp converter by OpenMax covers Unix timestamp conversion, millisecond timestamps, UTC to local time, time zone conversion, batch time conversion, time range calculation, and JSON time field extraction.

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FAQ

What is the difference between 10-digit and 13-digit timestamps?

10 digits usually means seconds. 13 digits usually means milliseconds.

Does this tool upload my data?

No. The tool runs in your browser. Local history is stored only in browser localStorage.

What can this timestamp tool be used for?

It is useful for Unix timestamp conversion, date to timestamp, UTC to local time, time zone conversion, batch conversion, and log time debugging.

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Free Timestamp Converter