A Unix timestamp (or Epoch time) is a system for describing a point in time. It is defined as the number of seconds that have elapsed since midnight (UTC) on January 1, 1970, minus leap seconds. It is the standard way computer systems, databases, and APIs store dates internally because integers are much faster to sort and compare than parsed string dates.
Seconds vs Milliseconds
Different programming languages use different default scales. PHP and standard Unix systems measure the epoch in Seconds. JavaScript (and therefore Node.js and many modern web frameworks) measures the epoch in Milliseconds. Our converter automatically detects the magnitude of your number and parses it correctly.
About Unix Timestamp Converter
Instantly convert Unix epoch timestamps (seconds or milliseconds) into human-readable dates. It's built for date, time and scheduling calculations, runs instantly, and works on any device — no install, no sign-up.
How to use Unix Timestamp Converter
Paste or type your input into the editor on the left.
Leave the defaults, or tweak them if the tool exposes options.
The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
Copy the output, or download it, and you're done.
Why use Unix Timestamp Converter?
Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
Private by default — your input never leaves your device.
Accurate — the same, well-tested logic powers both this page and the public API.
Free — unlimited use in the browser, with an optional API for automation.
Use it from the API
Everything this page does is also available as a REST endpoint, so you can call Unix Timestamp Converter from your own code, a script or a CI pipeline.
The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.
Frequently asked questions
Is Unix Timestamp Converter free to use?
Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.
Is my data private?
Yes. Unix Timestamp Converter runs entirely in your browser — your input never leaves your device and nothing is logged or stored.