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ISO Date FormatterFast utility.

Format dates into ISO 8601, UTC, or custom patterns.

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Browser-first

Designed for fast, practical workflows without unnecessary friction.

Free utility

Built by Data Menu to help developers, operators and data teams move quicker.

Data-ready

Useful for formatting, cleaning, generating, converting and validating everyday data.

Interactive workspace

Paste, generate, convert or clean your data directly in the tool below.

Ready to use
Timezone
Input date/time (ISO, RFC, local “YYYY-MM-DD HH:mm”, epoch, or natural like “now”, “+2h”)
ISO (UTC)
2026-09-12T13:15:01.703Z
UTC (pretty)
12/09/2026 13:15:01
Local (UTC)
12/09/2026 13:15:01
RFC-2822
Sat, 12 Sep 2026 13:15:01 +0000
Epoch (seconds)
1789218901
Epoch (milliseconds)
1789218901703
Relative
in 0 seconds
Custom format builder (tokens: YYYY MM DD HH mm ss SSS ZZ Z)
Preview
2026-09-12T13:15:01Z
Presets
ISO 8601
Databases
Human
Language-friendly
One value per line. Accepts ISO, RFC, local “YYYY-MM-DD HH:mm”, epoch, or natural (“now”, “+2h”).
InputErrorISOUTCLocalRFCEpochEpoch msCustom
Results appear here…

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