How to convert dates and timestamps in 3 easy steps
- 1
Enter a date or timestamp
Pick a date, or paste a Unix timestamp in seconds.
- 2
Read all formats
ISO 8601 UTC and local, epoch seconds and milliseconds.
- 3
Copy what you need
Each format is one click from your clipboard.
Why use the iso 8601 converter tool from Super Utility Hub?
APIs speak ISO 8601; databases store epoch seconds; logs mix both. This converter translates any date — or any Unix timestamp — into ISO 8601 (UTC and local), epoch seconds, epoch milliseconds, and a readable weekday date.
Paste a timestamp like 1700000000 or pick a date; every format appears at once.
- Processes everything in your browser — no upload servers involved
- Free forever with unlimited uses
- Works on Windows, macOS, Linux, Android and iOS
- No watermark or branding on your output, ever
Frequently asked questions
What exactly is ISO 8601?
The international date format standard — e.g. 2026-08-18T14:30:00Z. It is unambiguous and sortable, which is why APIs use it.
Are epoch milliseconds supported?
Yes — the converter outputs both seconds and milliseconds. Input is seconds (the common form).
Does it handle time zones?
The moment is the same everywhere; the tool shows it in UTC and in your device's local zone.