đź•’ Unix Time Converter
Convert Unix timestamps (seconds since 1970-01-01 UTC) to human-readable dates and back.
Enter a Unix timestamp or a date/time string to translate between epoch seconds and standard calendar formats. Toggle UTC or local display to match your needs.
Unix Timestamp → Date
Count of seconds since Jan 1, 1970 UTC. Supports negative values for dates before 1970.
UTC ISO 8601
2023-11-14T22:13:20.000Z
Calendar Date
Tue Nov 14 2023
Time of Day
22:13:20 GMT+0000 (Coordinated Universal Time)
Date → Unix Timestamp
Accepts ISO strings (YYYY-MM-DDTHH:mm:ss) or any format recognized by your browser’s Date parser.
Unix Timestamp
1,699,963,200
UTC
2023-11-14T12:00:00.000Z
Local Time
11/14/2023, 12:00:00 PM
How to Use This Calculator
Convert Unix time to date
Enter the timestamp in seconds. Choose whether to view the result in UTC or your local timezone.
Convert date to Unix time
Type or paste a date/time string (ISO recommended). The converter outputs epoch seconds plus UTC/local formats.
Copy the outputs
Use the results for API calls, database entries, or documentation. The converter normalizes formatting for consistency.
Formula
Unix Timestamp (seconds) = milliseconds since 1970-01-01 UTC Ă· 1000
Date = new Date(Unix Timestamp Ă— 1000)
Remember that Unix time ignores leap seconds and assumes UTC by definition.
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Unix time is a widely used representation for timestamps in APIs, databases, and backend systems. This converter bridges human-readable dates and epoch seconds so you can debug issues and format data without manually multiplying by 1000.
It supports negative timestamps (dates before 1970) and displays UTC and local time outputs for clarity when dealing with time zones.
Pair it with logging tools or cron schedule planners to verify timestamps and schedules quickly.
Frequently Asked Questions
Does the converter use milliseconds?
No. Unix time is given in seconds. Multiply by 1000 if you need JavaScript’s millisecond timestamps.
Why are there slight differences between UTC and local output?
Local time applies your system’s timezone and daylight-saving rules, while UTC is timezone-independent.
What about leap seconds?
Unix time ignores leap seconds. For most applications this is acceptable; specialized astronomical calculations require more precise systems.
Can I paste dates like “November 14, 2023 12:00:00”?
Yes, as long as your browser’s Date parser recognizes the format. For best results, use ISO 8601 strings.