Unix Timestamp Converter
Convert a Unix epoch timestamp to a human date and back, instantly — privately, in your browser.
What is a Unix timestamp?
A Unix or epoch timestamp is a single integer that counts the seconds that have elapsed since 1 January 1970, 00:00:00 UTC. Because it is just a number, it carries no timezone and no formatting ambiguity — the same value means the same instant everywhere on Earth. Programmers, databases, logs and APIs use it constantly, which is why you so often meet values like 1700000000 and need to know what date that was. The tool converts a timestamp into both UTC and your local time, and works backwards too, turning a calendar date into its epoch value. It auto-detects whether the number you typed is in seconds or milliseconds: values below roughly one trillion are treated as seconds, and larger ones as milliseconds. There is a quick Now button to grab the current moment, and everything is computed locally in your browser.
Example
Enter 1700000000 and the tool returns 2023-11-14 22:13:20 UTC plus the local equivalent. The same instant as milliseconds, 1700000000000, resolves to the identical date and time.
Who is this epoch timestamp converter for?
This free epoch timestamp converter is built for anyone who needs to make a conversion quickly, but a few groups reach for it most often.
- Students and young adults: Programming classes use Unix time daily. An epoch timestamp converter for students turns a number into a readable date.
- Designers and developers: Developers logging and debugging use an epoch timestamp converter to read a number from a stack trace.
- Professionals: Database and analytics teams use the epoch timestamp converter to describe when a row was written.
- Curious users: You can use the epoch timestamp converter to see how far back 1970 really was.
Epoch to date reference table
Each timestamp is the number of seconds since 1970-01-01 00:00:00 UTC, which is exactly what the converter reads.
| Date (UTC) | Time | Unix timestamp |
|---|---|---|
| 1970-01-01 | 00:00:00 | 0 |
| 2000-01-01 | 00:00:00 | 946684800 |
| 2024-01-01 | 00:00:00 | 1704067200 |
| 2025-01-01 | 00:00:00 | 1735689600 |
| 2026-01-01 | 00:00:00 | 1767225600 |
Common use cases
- Decoding a timestamp from a database row, log file or API response into a readable date.
- Troubleshooting row-level timestamps when investigating a bug or a data pipeline.
- Generating a timestamp for a script or a test payload.
- Comparing two timestamps to measure the elapsed time between events.
Pro tips
- 10 digits usually means seconds; 13 digits means milliseconds — the tool detects this automatically, but keep it in mind when copying.
- A Unix timestamp is always UTC; only the human-readable display is converted to your local timezone.
- A 32-bit timestamp overflows in 2038; most modern systems use 64-bit and are unaffected.
- Use the Now button to get the current timestamp instead of typing it.
How to use
- Paste a Unix timestamp into the first box (seconds or milliseconds). The UTC and local dates appear instantly.
- Or pick a date and time in the lower box and click Convert to get its epoch value in seconds and milliseconds.
- Click Now to insert the current time.
FAQ
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since 00:00:00 UTC on 1 January 1970, ignoring leap seconds.
How do I know if a number is seconds or milliseconds?
If the value is larger than about 1,000,000,000,000 (1e12) it is treated as milliseconds; otherwise it is treated as seconds. The tool auto-detects this.
Is it free and private?
Yes. Conversion runs entirely in your browser and nothing is sent to a server.
What is a Unix timestamp?
It is the number of seconds since 1970-01-01 00:00:00 UTC. It represents a moment in time as a single timezone-free integer.
What is the difference between seconds and milliseconds?
Seconds is the standard Unix time; milliseconds is the count multiplied by 1,000, which JavaScript and many APIs use. The tool detects and handles both.
How do I convert a date to a timestamp?
Enter the date in the date-to-timestamp field; the tool returns the epoch value in seconds and milliseconds.
Can timestamps be negative?
Yes. Negative values represent dates before 1970, for example -31536000 is 1 January 1969.
Is a Unix timestamp always UTC?
The number itself is UTC-based and timezone-free. When displayed as a date, the tool shows both UTC and your local time.
What is the Y2038 problem?
A 32-bit signed timestamp reaches its limit on 19 January 2038. Around it, 64-bit systems and modern libraries are not affected.
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