Unix Timestamp Converter

A Unix timestamp is the number of seconds elapsed since January 1, 1970 at 00:00:00 UTC — called the Unix epoch. It is the standard time representation in most programming languages, databases, and APIs because it is timezone-independent and a simple integer, making it easy to store, index, compare, and transmit across systems in different locales.

Because a timestamp is a single integer rather than a formatted string like Sat, 14 Aug 2026 14:15:22 GMT, it is efficient for databases to store and index, and unambiguous when passed between servers in different timezones. Converting to a human-readable format happens in the display layer — the raw timestamp stays timezone-neutral.

1. Convert a timestamp to a date — paste a Unix timestamp (10 digits for seconds, 13 digits for milliseconds) into the timestamp field and the human-readable date appears instantly.
2. Convert a date to a timestamp — enter or pick a date and time in the date field and the corresponding Unix timestamp is generated automatically.
3. Check the current timestamp — the tool displays the live current Unix timestamp in real time, useful for quick reference when writing code or constructing API requests.
4. Copy the result — click the copy button to grab either the timestamp or the formatted date string for use in your code or logs.

One of the most common time-related bugs in software is mixing up seconds and milliseconds. A Unix timestamp in seconds is currently 10 digits long (e.g. 1738592000). A milliseconds timestamp is 13 digits long (e.g. 1738592000000). JavaScript's Date.now() and Java return milliseconds; PHP's time(), Python's time.time(), and most Unix system calls return seconds. This converter auto-detects which format you pasted based on the digit count.

• Developers debugging API responses that return Unix timestamps and need to quickly verify what date and time they represent without writing code.
• Data analysts parsing log files where events are recorded as epoch timestamps and need to convert them to readable dates for analysis or reporting.
• Anyone who needs to generate or read a timestamp quickly — reading JWT expiry fields, building mock API fixtures, or verifying date arithmetic in a database query.

• Privacy — all conversion runs in your browser; no timestamps or dates are sent to a server.
• Free — no account, no subscription, no usage limits.
• No account required — paste a timestamp and get the result immediately.
• Auto-detects seconds vs. milliseconds — the tool identifies whether your timestamp is 10 or 13 digits and handles the conversion automatically.

Reading the exp or iat fields in a JWT token to determine when it was issued or when it expires. Converting database timestamps in log exports to verify when events occurred during an incident investigation. Generating the current Unix timestamp to hard-code a test fixture or mock API response. Confirming date arithmetic when calculating durations between two timestamps — paste both, convert them, and compare the results.