Date to Unix Converter
Convert dates, ISO 8601 strings, and human-readable times to Unix epoch timestamps. Runs entirely in your browser.
Enter a timestamp or date above to convert, or click Use Now to start with the current time.
Quick Reference
| Format | Example |
|---|---|
| Unix (seconds) | 1735689600 |
| Unix (milliseconds) | 1735689600000 |
| ISO 8601 | 2025-01-01T12:00:00Z |
| Date string | Wed, 01 Jan 2025 12:00:00 GMT |
This tool runs entirely in your browser. No data is ever sent to any server.
Timestamp Conversion FAQ
What formats can I enter?
You can enter ISO 8601 strings (2025-01-01T12:00:00Z), RFC 2822 dates (Wed, 01 Jan 2025 12:00:00 GMT), or common date formats (2025-01-01 12:00:00). The tool will attempt to parse any recognizable date format.
What timezone is assumed for input?
If your input includes a timezone (like Z for UTC or a +/- offset), that timezone is used. If no timezone is specified, your browser's local timezone is assumed.
Why do I get both seconds and milliseconds?
Different APIs and systems use different precisions. JavaScript and Java typically use milliseconds, while Python, Go, and most Unix tools use seconds. We provide both for convenience.
Is this conversion accurate?
Yes. The conversion uses JavaScript's built-in Date API, which accurately handles dates within the range of approximately 271,821 BCE to 275,760 CE.
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