--- title: Epoch Converter – Unix Time to Date & Back description: Free epoch converter. Turn Unix epoch time into a human-readable date — seconds, milliseconds and microseconds detected automatically, shown in UTC, your local timezone and ISO 8601 — or get the epoch for any date. Current epoch ticks live. canonical: https://watchfor.io/epoch-converter --- [Back to all free tools](/free-tools) # Epoch Converter Convert epoch time to a human date and back — seconds, milliseconds and microseconds detected automatically, shown in UTC, your local timezone and ISO 8601, with the current epoch ticking live. Decode the timestamp in a log line or a JWT, or get the epoch for a date. Free, instant, no signup. Epoch time — the number of seconds since 1970-01-01 00:00:00 UTC — is how computers store moments, and it is unreadable to people. A log line says `1757664000`, a JWT's `exp` claim says `1757750400`, a database row says `1757664000123`, and the question is always the same: when is that, in my time? Paste the number and this converter tells you, in UTC, in your timezone and as ISO 8601. It works in both directions and guesses the unit from the digit count: ten digits is seconds, thirteen is milliseconds, sixteen is microseconds. The current epoch at the top updates every second, which is the fastest way to sanity-check a timestamp that looks off by a factor of a thousand. Current Unix timestamp … Timestamp → date Now Date → timestamp (your local time) Pick a date and time to get its Unix timestamp in seconds and milliseconds. ## Timestamp formats at a glance Format Example Where you'll see it Unix seconds 1767225600 APIs, databases, most Unix tools Unix milliseconds 1767225600000 JavaScript Date.now(), Java, logs ISO 8601 / RFC 3339 2026-01-01T00:00:00Z JSON APIs, OpenAPI, sortable logs RFC 2822 Thu, 01 Jan 2026 00:00:00 +0000 Email headers, HTTP Date header Everything here runs in your browser — timestamps you paste are never sent anywhere. Working with response times instead? Try the [ping test](/ping-test) or the [uptime calculator](/uptime-calculator). ## Frequently asked questions What is epoch time? The count of seconds elapsed since the Unix epoch, 1 January 1970 at 00:00:00 UTC, not counting leap seconds. Also called Unix time or POSIX time. It's timezone-free by definition — the same instant is the same number everywhere. How do I tell seconds from milliseconds? By length. Dates in the 2000s are 10 digits in seconds (1757664000) and 13 in milliseconds (1757664000000). JavaScript's Date.now(), Java and most JSON APIs use milliseconds; Unix tools, PHP time() and most databases use seconds. The converter detects the unit for you. Why does the date come out in 1970 or in the year 57000? Wrong unit. A millisecond value read as seconds lands tens of thousands of years in the future; a seconds value read as milliseconds lands in January 1970. Multiply or divide by 1000. What is the year 2038 problem? Signed 32-bit integers overflow at 2,147,483,647 — which as epoch seconds is 19 January 2038, 03:14:07 UTC. Systems that still store time in 32 bits wrap to 1901. Anything built in the last decade uses 64-bit time and is unaffected. Is epoch time affected by timezones or daylight saving? No. The number represents an instant in UTC. Timezones only matter when you format it for display — which is why the converter shows UTC and your local time side by side, and why two people can see different clock times for the same epoch. How do I get the current epoch on the command line? `date +%s` on Linux and macOS (seconds), `date +%s%3N` for milliseconds on GNU date. In JavaScript, `Math.floor(Date.now() / 1000)`; in Python, `int(time.time())`. ## Timestamps decoded — now decode your downtime Every incident timeline starts with "when exactly did it break?". WatchFor records every check with precise timestamps, alerts you within seconds and gives you the full timeline from multiple regions. [Start monitoring for free](/pricing) Free plan · 15 monitors · no credit card required --- Canonical page: https://watchfor.io/epoch-converter · Site guide: https://watchfor.io/llms.txt