Date Difference & Age Calculator
Count calendar days and completed years between two dates.
Batch Unix Timestamp Converter
Convert a list of Unix seconds to UTC ISO timestamps.
Processed locally in your browser.
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How to use Batch Unix Timestamp Converter
- Choose Example to see valid input, or enter your own data.
- Run the tool and review the result. Invalid inputs show a helpful error.
- Copy or download the output, or use Reset to clear the workspace.
Practical example
0 1700000000 1800000000
Common question
What should I know before using this tool?
Input is seconds, not milliseconds. Fractional seconds are allowed; output precision is milliseconds.
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