Timestamp Converter
Convert Unix timestamps (sec/ms) to human-readable dates and vice versa instantly.
Two-Way Conversion
Enter an epoch number to get human-readable dates, or enter an ISO string to get the exact Unix timestamp. It works instantly.
Client-Side Calculation
All time parsing relies on your browser's native JavaScript `Date` API. Your local timezone rules (including DST) are strictly applied.
Timestamp Use Cases
Frequently Asked Questions
Q. What is the Unix Epoch?
It is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT).
Q. What is the difference between seconds and milliseconds?
Seconds are typically 10 digits long, while milliseconds are 13 digits.
Q. How are timezones handled?
All conversions automatically use your local browser time unless otherwise specified.
Q. What is the Y2K38 problem?
It is a time formatting bug where 32-bit signed integers will overflow on January 19, 2038.
Q. What is ISO 8601?
It is an internationally recognized standard for formatting dates and times.
Unix Timestamp Units
| Type | Digits | Example |
|---|---|---|
| SecSeconds (sec) | 10 digits | 1672531200 (PHP, Python) |
| MSMilliseconds (ms) | 13 digits | 1672531200000 (JS, Java) |
| μsMicroseconds (μs) | 16 digits | 1672531200000000 (DB, High Precision) |
Differences in digits and usage.
The Year 2038 Problem (Y2K38)
The limitation of 32-bit signed integers.
Max value is 2,147,483,647 (Jan 19, 2038)
Systems using 32-bit int will overflow to 1901
Migrate DB columns to 64-bit integer (BIGINT)
⚠️ Always use 64-bit integers for future-proof timestamps.
Key Features
- Real-time two-way sync
- ms/sec auto detection
- Relative time display (e.g., 2 hours ago)
- 100% local execution
A free online unix timestamp converter and epoch converter online to easily format epoch time to readable dates.