Batch Timestamp Converter
Paste a whole column of timestamps or dates and convert every line at once, ready to paste back into a spreadsheet.
Input
Converting a whole column at once
Paste one value per line — timestamps, ISO dates, or a mix of both. Each line is converted independently, and lines that cannot be read are reported in place rather than aborting the run.
Copy as TSV gives you tab-separated columns that paste straight into a spreadsheet.
Frequently asked questions
How many lines can it handle?
Everything runs in your browser, so the practical limit is memory. Tens of thousands of lines convert without trouble.
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