Unix Timestamp Converter
Convert between Unix timestamps, ISO 8601, and human-readable dates. Runs in your browser: what you enter is not sent to our servers.
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 |
What you enter stays in your browser: this tool doesn't send it to our servers.
Timestamp Conversion FAQ
What is a Unix timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC. It's widely used in programming, databases, and APIs as a standardized way to represent time.
How do I know if a timestamp is in seconds or milliseconds?
This tool auto-detects the format. Timestamps with more than 10 digits (like 1735689600000) are treated as milliseconds. Timestamps with 10 or fewer digits (like 1735689600) are treated as seconds.
What date formats does this tool accept?
The tool accepts Unix timestamps (seconds and milliseconds), ISO 8601 (e.g. 2025-01-01T12:00:00Z), RFC 2822 (e.g. Wed, 01 Jan 2025 12:00:00 GMT), and common date strings (e.g. 2025-01-01 12:00:00).
Is my data safe?
Yes. All conversions happen locally in your browser using standard JavaScript Date APIs. This tool doesn't send your timestamps to our servers.
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