Online DateTime Converter
Date ConvertTimestampFormatBatch
Convert dates between YYYY-MM-DD, YYYY/MM/DD, MM-DD-YYYY, ISO 8601, timestamp (s/ms), YYYYMMDD and more. Custom output format with YYYY/MM/DD/HH/mm/ss tokens, batch line-by-line conversion, all local processing.
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How to Use
- Enter a timestamp or date-time string
- Converts both ways between local time and UTC
- Switch second/millisecond precision and copy
- All processing runs locally in your browser; your code is never uploaded
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FAQ
Which input formats are supported?
YYYY-MM-DD, YYYY/MM/DD, YYYY.MM.DD, YYYY-MM-DD HH:mm:ss, MM-DD-YYYY, MM/DD/YYYY, DD/MM/YYYY, YYYYMMDD, ISO 8601, timestamp s/ms and auto detection.
How to customize output format?
Check Custom and enter a template with YYYY, MM, DD, HH, mm, ss, SSS placeholders, e.g., YYYY年MM月DD日 HH:mm:ss.
How to batch convert?
Enter one date per line, select from/to formats and click Convert. Empty lines are preserved; failed lines show ERROR.
Will my data be uploaded?
No, all parsing and formatting runs locally in your browser.