Unix Timestamp to Date Converter Online
Runs 100% in your browser — your files never leave your device.
Timestamps like 1700000000 are everywhere — APIs, log files, databases — and doing the math on them in your head is hopeless. Paste a Unix timestamp (seconds or milliseconds, auto-detected) or any date string and get every useful form at once: Unix seconds, milliseconds, ISO 8601, RFC 2822, and your local time. One click copies any of them.
How it works
- 1
Paste a timestamp or date
Plain numbers are read as Unix time — under 13 digits means seconds, 13+ means milliseconds.
- 2
Read every format at once
Unix seconds, milliseconds, ISO 8601, RFC 2822, and your local time.
- 3
Copy what you need
Each format has its own copy button — or press Now to stamp the current time.
Related tools
Add Days, Months, or Years to a Date Online Add or subtract years, months, days, hours, and minutes from any date — with proper month-end handling — and get the exact result. Free, in-browser. Area Calculator Online — Circle, Rectangle, Triangle Calculate the area of a circle, square, rectangle, triangle, or trapezoid from its dimensions — the result updates as you type. Free, in-browser. Average of a List of Numbers Online Calculate the average of a list of numbers — with the sum and count alongside — instantly as you type. Free, in your browser, nothing uploaded. Calculator Online (Arithmetic with Exponents) A clean online calculator for arithmetic with powers, modulo, and parentheses — the result updates as you type. Free, no sign-up, in your browser. Countdown Timer Online to Any Date Count down to any date and time with a live ticking timer — days, hours, minutes, seconds. Free, in your browser, nothing to install. Date and Time Difference Calculator Online Calculate the exact time between two dates — days, hours, minutes, and seconds — with live results. Free, in your browser, no sign-up.
More calculators & math
Percentage Calculator Online Three percentage calculations in one place: X% of Y, X is what % of Y, and percent change — live results as you type. Free and in-browser. Number Sequence Generator Online Generate a list of numbers from any start with any step — arithmetic sequences up to 10,000 long — and copy the result. Free, in your browser. Filter a List of Numbers Online Keep only the numbers in a range — set a minimum, a maximum, or both — and copy the filtered list. Free, in your browser, nothing uploaded.