Developer Tool
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Auto-detects seconds vs milliseconds, shows multiple formats including relative time.
Your data is processed locally in your browser and is never uploaded.
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FAQ
- How is seconds vs milliseconds detected?
- Values greater than 1 trillion are treated as milliseconds (since they represent dates after ~2001). Otherwise they are treated as seconds. You can override the detection.
- What timezone is used for display?
- Your browser's local timezone is shown alongside UTC. The timezone name is displayed so you know exactly which zone applies.
- Is my data sent to a server?
- No. All timestamp conversions happen locally in your browser. No data leaves your device.
- Can I convert a date back to a Unix timestamp?
- Yes. Use the date-to-timestamp section to pick a date and get the corresponding Unix timestamp in both seconds and milliseconds.