Unix Timestamp Converter

Convert Unix timestamps to human-readable dates instantly

A Unix timestamp is the number of seconds (or milliseconds) elapsed since the Unix epoch, 1970-01-01T00:00:00Z. Databases, log files, APIs, and JWTs store time this way because it is compact and time-zone independent, but it is unreadable at a glance. This Unix timestamp converter turns any epoch value into a formatted date and time, and converts a calendar date back into a timestamp, so you can debug and cross-reference times in seconds.

How it works

Everything runs locally in your browser using JavaScript's native Date object. Paste a timestamp in seconds or milliseconds and the tool detects the unit, then shows the equivalent UTC time, your local time, and an ISO 8601 string. Enter a date instead and it returns the matching epoch value. Nothing is sent to a server, so it keeps working offline once the page has loaded.

Practical use cases

• Decode iat and exp claims when inspecting tokens with the JWT Decoder.
• Match a log entry's epoch value to a real-world time zone during an incident.
• Verify database created_at columns stored as integers.
• Sanity-check expiry values before shipping scheduled jobs.

Working with recurring schedules too? Pair it with the Cron Expression Parser to preview run times, or build a schedule from scratch with the Cron Expression Generator.

Private by design

Because the conversion happens entirely client-side, your timestamps and dates never leave your machine, with no upload, no logging, and no account required. It is free to use on any modern desktop or mobile browser.