Unix Timestamp Converter
Convert Unix epoch timestamps (seconds or milliseconds) to human-readable dates and vice versa.
The Unix Timestamp Converter is a programmer's utility to translate raw epoch integers (the number of seconds elapsed since January 1, 1970 UTC) into standard calendar dates, and convert standard dates back into Unix code variables.
How to Convert Unix Timestamps
- Select your translation mode: Epoch to Date, or Date to Epoch.
- Input the numerical timestamp (supports seconds or milliseconds) or pick a calendar date/time.
- Review the results displaying equivalent local time, UTC time, and ISO 8601 strings.
- Use the quick-copy button to paste the result directly into your code editor.
Database Log Auditing
Translate integer timestamps found in database error dumps or transaction logs to determine exactly when a failure occurred.
API Payload Coding
Generate Unix timestamp values to build API requests that require strict epoch parameters.
Security Token Validation
Decode the expiry ('exp') epoch timestamp in JSON Web Tokens (JWT) to check token lifespan issues.
For related calculations, check out other utility widgets such as NTP Time Tester Online, Leap Second History Log, and UTC/GMT Offset Finder.
Frequently Asked Questions
What happens when Unix time reaches the year 2038?
On January 19, 2038, 32-bit Unix integers will overflow. Systems are actively upgrading to 64-bit integers, which prevents this issue for billions of years.
How does the tool distinguish between seconds and milliseconds?
The converter checks the length of the input. Timestamps with 10 digits are parsed as seconds, while 13 digits or more are treated as milliseconds.
Is Unix time affected by leap seconds?
Unix time ignores leap seconds. Every day is treated as having exactly 86,400 seconds, meaning Unix clocks briefly adjust during leap updates.