TimeStamp Converter
FREEConvert between Unix timestamps and human-readable dates instantly — in both directions. This free timestamp converter turns any epoch value (in seconds or milliseconds) into a clear date and time, and turns any date back into a Unix timestamp. It shows the live current timestamp updating in real time, displays results in both UTC and your local timezone, and lets you copy any value with one click. Everything runs in your browser using JavaScript — nothing is uploaded or stored. No signup, no limits, built for developers.
About Unix Timestamps
A Unix timestamp — also called epoch time, POSIX time, or Unix time — is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC, known as the Unix epoch. Because it's a single integer independent of time zones, it's the universal way software stores and exchanges time across databases, APIs, and logs. Timestamps come in seconds (10 digits) and milliseconds (13 digits, common in JavaScript and Java). We built this converter to make reading and generating those values effortless, entirely in your browser with nothing stored.
How to Convert a Timestamp
It's instant. To convert a timestamp to a date, paste your Unix value into the input — the tool auto-detects seconds or milliseconds and shows the date and time in both UTC and your local timezone. To convert a date to a timestamp, enter the date and time and read the epoch value back. The live current timestamp updates in real time whenever you need "now," and a single click copies any result. Every conversion happens in your browser — nothing is sent to a server.
Common Mistakes to Avoid
❌ Confusing seconds with milliseconds
✓ Solution:
A 10-digit timestamp is seconds; a 13-digit one is milliseconds. Feeding a milliseconds value into a seconds field lands you thousands of years in the future. Check the digit count, and let the converter auto-detect or pick the right unit.
❌ Ignoring the timezone of the result
✓ Solution:
A Unix timestamp is always UTC, but you often need local time. Mixing them up shifts your result by hours. Always confirm whether you're reading the UTC value or your local-timezone value before using it.
❌ Assuming the timestamp includes a timezone
✓ Solution:
Epoch time has no timezone baked in — it's a single UTC-based number. The offset is applied only when it's displayed. Store and compare the raw timestamp, and convert to a timezone only for display.
❌ Forgetting the Year 2038 problem with 32-bit systems
✓ Solution:
32-bit signed timestamps overflow on January 19, 2038. If you're working with older systems, use 64-bit timestamps so dates beyond 2038 don't wrap around to 1901.
❌ Copying a formatted date when you needed the raw value
✓ Solution:
APIs and databases usually expect the integer timestamp, not a human-readable string. Copy the epoch value itself for code, and reserve the formatted date for display and reporting.
Frequently Asked Questions
A Unix timestamp is the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC — a moment called the Unix epoch. It's also known as epoch time or POSIX time. Because it's a single integer with no timezone attached, it gives software a simple, universal way to store and compare time across systems.
Seconds-based timestamps have 10 digits (e.g. 1735689600), while milliseconds-based timestamps have 13 digits (e.g. 1735689600000). Languages like JavaScript and Java commonly use milliseconds, while Unix systems and many APIs use seconds. This converter handles both — just paste the value and it detects the unit.
Yes. It displays each result in both UTC and your device's local timezone, so you can read whichever you need. The underlying timestamp itself is always UTC-based; the local time is calculated for display using your system's timezone settings.
No. All conversions run locally in your browser using JavaScript — nothing you enter is uploaded, logged, or stored on any server. That makes the tool fast, private, and safe for values from internal logs, tokens, or production systems.
On January 19, 2038, 32-bit signed Unix timestamps will overflow and wrap around to 1901, breaking time on affected systems. Most modern platforms have already moved to 64-bit timestamps, which push that limit billions of years into the future, so new applications generally aren't at risk.
Timestamp Converter — Free Unix Epoch to Date & Date to Timestamp Tool (Seconds, Milliseconds, UTC & Local)
A timestamp converter that translates between Unix epoch time and readable dates without guesswork. Paste a Unix timestamp — 10-digit seconds or 13-digit milliseconds — and instantly see the matching date and time in both UTC and your local timezone. Go the other way too: pick a date and time and get the exact epoch value back. A live counter shows the current Unix timestamp ticking in real time, so you always have "now" on hand, and one click copies any result. Because every conversion runs locally in your browser with JavaScript, nothing you enter is uploaded, logged, or stored. That makes it a dependable everyday utility for developers debugging logs, working with APIs and databases, scheduling jobs, or checking token expiry — anywhere Unix time, POSIX time, and epoch timestamps show up.
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