Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Turn Unix timestamps into dates you can actually read - or go the other way. If you've ever pulled a timestamp like 1700000000 from a database and wondered what date that is, this tool gives you the answer instantly. It handles both seconds and millisecond formats automatically.
What's a Unix Timestamp?
It's a plain number that counts seconds since January 1, 1970, 00:00:00 UTC. That starting point is called the "Unix epoch." Every second that passes, the number goes up by one. So timestamp 1700000000 translates to November 14, 2023 at 22:13:20 UTC. Simple, but incredibly useful for storing dates in code.
Why Developers Use Timestamps
- They're timezone-independent - always based on UTC, so no confusion across regions
- Easy to compare - just compare two numbers to find which came first
- No date format ambiguity - no more wondering if 01/02/2024 means January 2nd or February 1st
- Supported across most programming languages and database systems
- Simple math - finding the difference between two dates is just subtraction
Seconds vs. Milliseconds
This trips people up constantly. Standard Unix timestamps are 10 digits (seconds). JavaScript's Date object uses 13 digits (milliseconds). If your converted date shows something in January 1970, you're probably passing seconds where milliseconds are expected - multiply by 1000. This tool auto-detects the format based on digit count.
The Year 2038 Problem
Systems that store timestamps in a 32-bit signed integer will overflow on January 19, 2038 at 03:14:07 UTC. That's when the counter hits 2,147,483,647 and rolls over. It's basically the Y2K bug for Unix time. Most modern systems already use 64-bit timestamps, but some older embedded systems and legacy code could still have issues.
Quick Conversion Commands
Need to convert in your terminal? On Linux or Mac, run date -d @1700000000. In Python, use datetime.utcfromtimestamp(1700000000). In JavaScript, new Date(1700000000 * 1000) gets you there. Each language handles it slightly differently, which is why having a web-based converter handy saves time.
How to Use
- Enter a Unix timestamp to see the human-readable date.
- Or enter a date to get its Unix timestamp.
- Results show in UTC, your local timezone and ISO 8601 format.
- Copy whichever format you need.
Frequently Asked Questions
How do I use the Timestamp Converter?
Paste a Unix timestamp or date string and choose the timezone display. The tool shows readable formats and timestamp values. Use it to debug logs, APIs and scheduled events.
Why does my date show as 1970?
You may be mixing seconds and milliseconds. A 13 digit value usually means milliseconds, while a 10 digit value usually means seconds. Using the wrong unit can push the date far off.
Are Unix timestamps affected by timezones?
The timestamp itself is not affected by timezones. It represents one moment in UTC. Only the displayed date changes by timezone. This is why the same timestamp can show different local times.
What is the 2038 problem?
Some old 32-bit systems cannot store timestamps beyond January 19, 2038. Modern systems usually avoid this with larger values. It still matters when dealing with old software or embedded systems.
Should I store dates as UTC?
For events that happen at one exact moment, UTC is usually safest. For human calendar events, keep timezone context too. A meeting at 9 AM is not the same kind of data as a server log.