Free Online Unix Timestamp Converter
Unix timestamps — those long numbers like 1740268800 — are how computers track time internally, but they are meaningless to humans at a glance. Our free timestamp converter translates Unix epoch timestamps into readable dates and times, and converts human-readable dates back into Unix timestamps. It is an essential everyday tool for any developer working with APIs, databases, or logs.
Whether you are debugging a timestamp in an API response, converting dates for a database query, or figuring out when a Unix timestamp in a log file actually occurred, this tool gives you the answer instantly.
How to Use the Timestamp Converter
Enter a Unix timestamp (seconds since January 1, 1970) to see the corresponding date and time in a human-readable format. Or enter a date and time to get the Unix timestamp equivalent. The tool handles both seconds and millisecond timestamps automatically. Results display in your local timezone by default.
Why Developers Need a Timestamp Converter
- Backend developers convert timestamps from database records and API responses for debugging.
- DevOps engineers interpret timestamps in server logs and monitoring alerts.
- Frontend developers convert between JavaScript Date objects and Unix timestamps.
- Data engineers transform timestamp columns in ETL pipelines and data migrations.
- QA testers verify that timestamp-based features (expiration, scheduling) work correctly.
Key Features
- Bidirectional conversion: timestamp to date and date to timestamp
- Supports both seconds and milliseconds timestamps
- Displays results in local timezone
- Real-time conversion as you type
- 100% browser-based — private and instant
Understanding Unix Timestamps
A Unix timestamp (also called epoch time) counts the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC. This date is called the Unix epoch. Timestamps before this date are negative numbers. Most programming languages and databases support Unix timestamps natively. JavaScript uses millisecond timestamps (multiply by 1000), while most other languages use second timestamps.
Frequently Asked Questions
What is the Unix epoch?
The Unix epoch is January 1, 1970, at 00:00:00 UTC. It is the reference point from which Unix timestamps count. A timestamp of 0 represents this exact moment. This convention was established in the early days of Unix operating systems.
What is the difference between seconds and milliseconds timestamps?
A seconds timestamp is a 10-digit number (like 1740268800), while a milliseconds timestamp is a 13-digit number (like 1740268800000). JavaScript's Date.now() returns milliseconds; most server-side languages use seconds. Divide a millisecond timestamp by 1000 to get seconds.
What is the Year 2038 problem?
Systems that store Unix timestamps as 32-bit signed integers will overflow on January 19, 2038. After that point, the timestamp wraps around to a negative number, causing date calculations to break. Most modern systems use 64-bit timestamps, which extend far beyond the year 2038.