Timestamp Converter for Unix, ISO & Local Time
Convert epoch timestamps, milliseconds, ISO strings, UTC dates, and local time formats for logs, APIs, databases, and documentation.
A timestamp converter turns machine time values into readable UTC, local, ISO, seconds, and milliseconds formats.
Unix time usually means seconds since January 1, 1970 at 00:00:00 UTC.
Know seconds vs milliseconds
JavaScript dates use milliseconds, while many APIs and logs use Unix seconds.
Prefer ISO for sharing
ISO and UTC output are easier to compare across devices, teams, and time zones.
Short numeric values are read as Unix seconds. Longer numeric values are read as Unix milliseconds.
Text values are parsed by the browser date parser.
Local time depends on the current browser and system time zone.
UTC and ISO output are useful when you need stable cross-region values.
Example
Paste a Unix timestamp from a log entry and copy the ISO date for a report.
Assumption
Very large numeric values are interpreted as milliseconds.
Limitation
Ambiguous date text can parse differently across browser environments.
Log debugging
Translate epoch values from application logs into readable dates.
API testing
Convert ISO dates and Unix values while checking request and response examples.
Database review
Inspect created_at, updated_at, and event time fields copied from records.
Documentation
Copy stable UTC or ISO values into reports, runbooks, and tickets.
What is Unix time?
Unix time counts seconds since January 1, 1970 at 00:00:00 UTC.
Why are there seconds and milliseconds?
Many APIs use seconds, while JavaScript Date values use milliseconds.
Can I copy the converted values?
Yes. Each output row has a copy button.
Does the tool use a backend?
No. Conversion happens in the browser.
Suggested workflow
Time debugging path
Convert machine timestamps, compare regions, and check schedule expressions when debugging time data.