Online DateTime Converter
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.
Auto detect handles common formats and timestamps
Tokens: YYYY YY MM DD HH mm ss SSS · Now preview: —
Format Tokens
Example: YYYY年MM月DD日 HH:mm:ss → 2024年01月15日 10:30:00; timestamp-s / timestamp-ms / ISO output corresponding values directly.
How to Use
- Paste any valid JSON, supports nesting, arrays and escapes
- Click Beautify to auto indent and format
- Click Minify to remove whitespace into one line
- All operations run locally for privacy
Related Tools
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.