Batch Timestamp Conversion
変換結果
タイムスタンプ＆Day付一括変換
Paste multiple timestamps or dates, one per line, choose the direction (timestamp → date or date → timestamp) and a time zone, and the results appear instantly in a table you can copy or export. Handy for logs, exported data tables and bulk API parameters.
Every conversion runs in your browser, so nothing you paste is sent to any server.
Features
- Bulk both ways — One input per line; seconds and milliseconds are auto-detected; dates accept "YYYY-MM-DD HH:MM:SS" or "YYYY-MM-DD".
- Time zone options — Results are interpreted and shown in local time, UTC, Beijing, New York, London, Tokyo and more.
- Table output — Results render as a two-column table; invalid rows are flagged in red for easy checking.
- Local first — No backend is involved, so even large batches never leave your device.
How to use
- Paste one timestamp or date per line in the left text box.
- Choose the conversion direction and time zone above.
- Results show instantly in the right-hand table; click "Copy" to take them.
FAQ
How much data can the batch converter handle?
It depends on browser memory; a few thousand rows usually convert instantly. For very large inputs, paste in chunks to avoid building one huge table at once.
What happens to a row with the wrong date format?
Unparseable rows are flagged in red and marked "invalid"; the other valid rows still convert, so the whole batch does not fail.