Convert a Unix timestamp into a human-readable date, or pick a date to get its Unix timestamp — with live results in local time, UTC and ISO 8601. Handy for developers debugging logs and video editors syncing timecodes.
A Unix timestamp is the number of seconds (or milliseconds) since January 1, 1970 — it's how most systems, APIs and log files store dates internally. This tool converts that raw number into a readable date, or the other way around, without needing to open a code editor.
It automatically detects whether your input is in seconds or milliseconds, and shows the result in local time, UTC and the ISO 8601 format commonly used in APIs.
Step 1 — Paste a timestamp or pick a date. Enter a Unix timestamp directly, or use the date/time picker if you're starting from a calendar date.
Step 2 — Read the converted results. The tool instantly shows the equivalent local time, UTC time, ISO 8601 string, and both seconds and millisecond timestamps.
Step 3 — Use "Now" for the current time. Click "Use Current Time" to instantly get the current Unix timestamp, useful for testing or logging.
Confusing seconds and milliseconds. JavaScript's `Date` object expects milliseconds, but most Unix timestamps in APIs are in seconds — mixing these up gives wildly wrong dates (often 1970 or far in the future).
Ignoring timezones. A timestamp is always the same instant in time, but the "local time" it displays depends on your browser's timezone — always check UTC if you need a timezone-independent value.
Assuming all APIs use the same unit. Some APIs return timestamps in seconds, others in milliseconds — always check the API documentation before converting.
A seconds timestamp counts seconds since Jan 1, 1970; a milliseconds timestamp counts milliseconds. This tool auto-detects which one you've entered based on its length.
Local time reflects your browser's timezone setting, while UTC is timezone-independent. The underlying moment in time is identical — only the displayed clock time differs.
ISO 8601 (e.g. 2026-07-08T00:00:00.000Z) is a standardised date format widely used in APIs, databases and international date exchange because it's unambiguous across regions.
Yes, negative Unix timestamps represent dates before January 1, 1970, and this tool will convert them correctly.
Timestamps show up everywhere — video upload metadata, API logs, analytics exports and scheduling tools. Being able to quickly convert between formats saves time when debugging or cross-referencing data.