Timestamp Batch Converter
Convert multiple Unix timestamps to human-readable dates at once. Supports seconds and milliseconds with timezone toggle.
Features
- ✓Convert multiple timestamps at once (one per line)
- ✓Supports Unix seconds and milliseconds automatically
- ✓Toggle between UTC and local timezone display
- ✓Shows ISO 8601, UTC, local time, and relative time
- ✓Highlights invalid timestamps with clear error messages
- ✓Works entirely offline — your data never leaves your browser
How to Use
- 1Paste multiple timestamps into the input field (one per line)
- 2Results appear automatically as you type
- 3Toggle between UTC and Local timezone display
- 4Copy all results with the Copy button
Examples
Input
1704067200 1706745600 1709251200
Output
2024-01-01T00:00:00.000Z 2024-02-01T00:00:00.000Z 2024-03-01T00:00:00.000Z
Input
1704067200 1704067200000 2024-06-15T12:00:00Z
Output
All converted to ISO/UTC/Local with relative times
Why Batch Convert Timestamps?
When debugging logs, analyzing data exports, or reviewing database records, you often encounter lists of Unix timestamps that need to be converted to human-readable dates. Doing this one at a time is tedious. This batch converter lets you paste an entire list and see all the results at once.
The tool automatically detects whether each timestamp is in seconds (10 digits, like 1704067200) or milliseconds (13 digits, like 1704067200000). It also accepts ISO 8601 date strings and other common date formats, converting everything to a consistent output format.
The timezone toggle lets you switch between UTC and your local timezone. This is especially useful when correlating events across systems that may log in different timezones. UTC is the standard for server logs, while local time helps you understand when events occurred relative to your own schedule.
Each result shows the ISO 8601 format (the universal standard), UTC string, local time, Unix timestamp in both seconds and milliseconds, and a relative time indicator (e.g., "3 months ago"). Invalid entries are clearly marked so you can spot format issues immediately.
All processing happens in your browser. Your timestamps — whether from production logs, database queries, or analytics exports — are never sent to any server.