Unix Timestamp Converter
Turn a Unix timestamp into human-readable local, ISO 8601, and UTC dates in one step.
Inputs
Unix seconds (10-digit) or milliseconds (13-digit) — auto-detected
Results
Human readable
Sunday, June 15, 2025 · 15:06:40
local time
ISO 8601
2025-06-15T15:06:40.000Z
ISO 8601 (UTC)
UTC
2025-06-15 15:06:40
UTC · HH:mm:ss
Days since epoch
20,254
days since 1970-01-01
Relative
199 days before reference
vs 2026-01-01 reference
About this tool
Paste a Unix timestamp in seconds or milliseconds (auto-detected) to get local time, ISO 8601, UTC, days since 1970-01-01, and a day offset from 2026-01-01.
How to use
- 1Enter the Unix timestamp in the timestamp field — seconds (10-digit, e.g. 1750000000) or milliseconds (13-digit); the unit is auto-detected.
- 2Read Human readable for the moment in your local timezone, and ISO 8601 / UTC for timezone-free values.
- 3Use Days since epoch (whole milliseconds divided by 86,400,000) for a coarse age in day units.
- 4Check Relative for the whole-day offset against the fixed 2026-01-01 reference.
Frequently asked questions
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