Tool for dates and time
Date, Unix timestamp and ISO 8601 converter
Transform time points between timestamps (Unix epoch), ISO 8601 strings, and human-readable dates in real time.
Supported formats
- Unix Timestamp in Seconds
- Unix Timestamp in Milliseconds
- ISO 8601 Standard (UTC)
- Formatted Local Date and Time
Instant time conversion
Convert timestamps and dates clearly
Enter the desired value, select the input type, and get all equivalent representations.
Enter a valid date or timestamp.
Input type
Summary
Enter a valid date/time value or type a seconds/milliseconds timestamp to perform immediate conversion.
Converted Formats
Fill in a valid value in the field above to display date and time representations.
Smart parsing and timezone support
- 1. Type the date or timestamp into the input field.
- 2. Select whether the input is a timestamp, ISO 8601 string, or calendar date.
- 3. The system interprets the value instantly via JavaScript's Date object.
- 4. Copy the version in your preferred format.
Essential for developers and data analysis
- Inspect log entries and API payloads formatted as Unix Epoch.
- Convert database ISO 8601 strings into human-readable text.
- Validate timezones and temporal representations during testing.
- Copy numeric timestamps for source code or database scripts.
FAQ
Summary
What does this date converter do?
The tool converts the same instant between Unix timestamp, browser local date, and ISO 8601 string in real time.
Can I input timestamps in seconds and milliseconds?
Yes. The field accepts both seconds and milliseconds since January 1, 1970 and automatically interprets value length.
What is the difference between local date and UTC?
Local date depends on browser timezone. UTC represents the same instant in universal reference without local offset variation.
Why can a time zone change the displayed date?
A timestamp represents an instant, but a local date is formatted according to the device time zone. Use UTC or ISO 8601 when comparing the same instant across regions.
Unit Converter
Convert length, mass, temperature, area, volume, time and speed.
Open toolBMI Calculator
Calculate BMI with weight and height, classification by range and educational explanation.
Open toolComplete Compound Interest Calculator
Simulate contributions, equivalent rate, growth chart and complete monthly table.
Open toolTurn timestamps into readable dates and back
The converter is for developers reading logs and databases, analysts comparing times, and anyone who needs to understand a number like 1700000000.
- Turn a Unix timestamp into a date and time.
- Convert an ISO 8601 date into the matching timestamp.
- Compare the same instant in your time zone and in UTC.
How to convert
- 1. Choose the input type: timestamp, ISO, or calendar date.
- 2. Enter the value.
- 3. Read the timestamp, the ISO date, and the local date.
- 4. Copy the format you need.
A number that counts time since 1970
A Unix timestamp is the number of seconds (or milliseconds) since January 1, 1970, in UTC. The tool tells seconds from milliseconds by the length of the number.
Seconds
Numbers with about 10 digits.
Common in Unix systems and many APIs.
Milliseconds
Numbers with about 13 digits.
Common in JavaScript and some databases.
ISO 8601
A format like 2023-11-14T22:13:20.000Z.
The trailing Z means the time is in UTC.
The timestamp 1700000000
With the timestamp type, enter 1700000000.
ISO 8601 (UTC)
2023-11-14T22:13:20.000Z
In milliseconds
1700000000000
The local date shown depends on your device's time zone: in New York it is 5:13:20 PM on the same day.
The time zone changes the reading, not the instant
A timestamp represents a single moment.
- The local date depends on the time zone set on your device.
- Daylight saving time and historical time zone changes follow the browser's rules.
- Use UTC or ISO 8601 when comparing times across regions.