Skip to main content
Home› Tools› Unix Timestamp Converter
🔧 Programming ✅ 100% Free ⚡ Instant

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and times, or convert any date back to a Unix timestamp. Shows UTC, local time, ISO 8601, and relative time ("3 hours ago"). Live clock included.

Enter a timestamp or pick a date.

What is a Unix Timestamp?

A Unix timestamp is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch). It is a timezone-independent way to represent any moment in time. JavaScript uses milliseconds (multiply by 1000), while most Unix systems and databases use seconds. The maximum 32-bit Unix timestamp is 2,147,483,647 — the "Year 2038 problem".

Frequently Asked Questions

Unix systems historically used 32-bit integers for timestamps storing seconds. JavaScript uses milliseconds for sub-second precision needed in web apps. When converting: divide Date.now() by 1000 to get Unix seconds, multiply Unix seconds by 1000 to get JS milliseconds.
Systems storing Unix timestamps as signed 32-bit integers will overflow at 03:14:07 UTC on 19 January 2038 (timestamp 2,147,483,647). After that the value wraps to a negative number, breaking date calculations. Modern systems use 64-bit integers which won't overflow for ~292 billion years.
JavaScript: Math.floor(Date.now()/1000). Python: import time; int(time.time()). PHP: time(). Go: time.Now().Unix(). SQL: UNIX_TIMESTAMP() (MySQL) or EXTRACT(EPOCH FROM NOW()) (PostgreSQL).
Copied!

Enjoying this tool?

Every tool here is free, forever — no signup, no paywall. If this one just saved you real time, a small tip keeps them free and ad-light.

☕ Support This Tool →

Need something built, not just formatted?

This toolbox is free. If your business needs custom software, AI integration, or a system built around this kind of tooling, that's what I do for a living.

Explore Software → Book a Consultation →

Frequently Asked Questions

Is this Unix Timestamp Converter free to use? +
Yes, completely free. No signup, no account, no payment required. Just paste your input and use it directly in your browser.
Does this tool store or send my data anywhere? +
No. Everything runs entirely in your browser using JavaScript. Your data never leaves your device or gets sent to any server.
What browsers does this tool support? +
It works in all modern browsers — Chrome, Firefox, Safari, Edge, and Opera — on both desktop and mobile.
Can I use this tool offline? +
Once the page is loaded, the tool runs locally in your browser without needing an active internet connection for most operations.
🔧
Custom Development

Need a Custom Version of This Tool?

This Unix Timestamp Converter works for most use cases — but if you need batch processing, API access, private hosting on your own domain, or a completely bespoke tool built around your workflow, I can build it.

Request Custom Build → Typical turnaround: 3–7 days