Epoch / Unix Timestamp Converter Online
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
Timestamp → Date
Date → Timestamp
What is a Unix Timestamp?
A Unix timestamp (epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It is widely used in programming, databases, and APIs to represent points in time as a single number.
Seconds vs Milliseconds
Some systems use seconds (10 digits, e.g. 1708099200) while others use milliseconds (13 digits, e.g. 1708099200000). This tool auto-detects the format based on the number of digits.
About This Tool
The Epoch Converter tool translates Unix timestamps to human-readable dates and converts dates back to Unix epoch seconds. Unix timestamps are the standard way to represent time in databases, APIs, log files, and programming languages across all time zones.
Key Features
- Timestamp to Date — Converts a Unix epoch (seconds since January 1, 1970 UTC) to a readable local date and time in your browser's timezone.
- Date to Timestamp — Converts any date and time you enter into the corresponding Unix timestamp in seconds for use in APIs and databases.
- Current Epoch Time — Displays the live current Unix timestamp in seconds and milliseconds, updating every second.
- Browser-Based Processing — All conversion runs locally in your browser using JavaScript Date objects. No data is sent to any server.
- Free & No Signup — Use this tool as many times as you need without creating an account or paying anything.
Common Use Cases
- Debugging API requests that use Unix timestamps in request headers or response payloads
- Checking whether a JWT token expiration timestamp (exp claim) has already passed
- Converting database-stored timestamps to readable dates for data analysis and reporting
- Generating epoch timestamps for constructing time-based queries or scheduled event triggers
- Reading log file timestamps and correlating events across different time zones
How to Use
The current Unix timestamp is shown at the top and updates live. To convert a timestamp to a date, paste the epoch value into the Timestamp field and click Convert. To convert a date to a timestamp, enter the date and time in the Date field and click Convert.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is a time zone-independent way to represent moments in time used by virtually all operating systems and programming languages.
What is the Year 2038 problem?
The Year 2038 problem affects 32-bit signed integers storing Unix timestamps. The maximum value (2,147,483,647) corresponds to January 19, 2038. After that date, the counter overflows. Modern systems use 64-bit integers which will not overflow for billions of years.
What is the difference between Unix timestamps in seconds and milliseconds?
Most Unix APIs use seconds. JavaScript's Date.now() and many web APIs return milliseconds. If a timestamp is 13 digits long, it is in milliseconds. Divide by 1000 to get seconds.
Are Unix timestamps affected by time zones?
No. Unix timestamps always represent UTC seconds regardless of local time zone. The human-readable display shows local time, but the underlying timestamp is always UTC.
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