Timestamp Converter
Free Local ProcessingFree online Unix timestamp converter supporting timestamp-to-date and date-to-timestamp bidirectional conversion, with seconds or milliseconds precision. The result shows local time, UTC time, and ISO 8601 format together. All processing happens in your browser, content never uploaded, privacy-safe.
Options
How to Use
- 1 Choose convert mode (Timestamp to date / Date to timestamp) and timestamp unit (Seconds / Milliseconds)
- 2 Enter a timestamp or date string in the input box
- 3 Click "Start Convert" button to view local time, UTC time, and ISO 8601 format results
FAQ
Q: Should I input seconds or milliseconds for timestamp to date?
Choose Seconds or Milliseconds in "Timestamp unit" based on your data. Backend APIs usually return seconds-level timestamps (10 digits); frontend JavaScript often uses milliseconds (13 digits).
Q: Which date formats are supported for date to timestamp?
Supports standard date strings like 2026-07-11, 2026-07-11 12:00:00, 2026-07-11T12:00:00Z. The input must be parseable by Date.parse, otherwise it will be reported as invalid.
Related Guides
- Text Timestamp Converter
Convert Unix timestamps (seconds or milliseconds) to readable dates and back.
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