◷Free
Unix timestamp converter
Convert Unix seconds/milliseconds and ISO timestamps with explicit timezone offsets.
Choose the timestamp unit when converting from Unix time; converting the other way requires seconds and Z or an explicit timezone offset in the ISO input. Unix zero corresponds to 1970-01-01T00:00:00.000Z.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Conversion direction: from Unix timestamp: 0 Timestamp unit: seconds ISO timestamp: 1970-01-01T00:00:00Z
Example result
{
"iso": "1970-01-01T00:00:00.000Z",
"seconds": 0,
"milliseconds": 0
}Limitations and details
Timestamps must resolve to whole safe milliseconds within years 0001–9999; zone-less local times and leap seconds are not accepted.
Inputs and options
- Conversion direction
- Timestamp to ISO / ISO to timestamp
- Unix timestamp
- Number
- Timestamp unit
- Seconds / Milliseconds
- ISO timestamp
- Text
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.