Timestamp Converter
Convert Unix timestamps to dates and back — seconds and milliseconds.
- UTC time
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- Local time
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- Unix (seconds)
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- Unix (milliseconds)
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Auto-detects units (values over 10 digits are treated as ms) · processed in your browser
About this tool
The Timestamp Converter turns a Unix timestamp into a human-readable date and time, and back again, in both directions. It is a daily helper for developers who debug data from logs, databases, or APIs that store time as a numeric epoch value rather than a formatted date string.
We have all stared at a long number like 1750000000 in an API response or a database column with no idea what day it represents. This unix timestamp converter solves exactly that: paste the number and the date appears immediately, or pick a date and time and let it produce the epoch value for you.
A few things make this epoch converter genuinely easy to use:
- It supports both seconds (10 digits) and milliseconds (13 digits), which is the single most common source of confusion
- It displays local time and UTC side by side, so you never have to do time-zone math yourself
- One-click copy lets you drop the value straight into your code or query
Whether you work in JavaScript, which uses milliseconds, or a backend system that uses seconds, this tool keeps your times aligned and correct. Every conversion happens right in your browser — it is free, needs no account, and nothing ever leaves your device. If you need more developer utilities, take a look at our tools page.
How to use
- 1Paste a Unix timestamp into the field and it converts to a readable date and time instantly
- 2Or pick a date and time to convert it back into a Unix timestamp
- 3Choose seconds or milliseconds to match the format of your data
- 4Read the result in both your local time and UTC
- 5Click to copy the value you need into your code or database
Frequently asked questions
- What is a Unix timestamp?
- It is the number of seconds counted since 1 January 1970 at 00:00 UTC, known as the epoch. It is used widely in databases and APIs.
- What is the difference between seconds and milliseconds?
- Classic Unix time counts seconds, but JavaScript and many APIs count milliseconds, which have 13 digits. Pick the matching unit before converting.
- Is this tool free and private?
- It is completely free with no signup, and every conversion runs in your own browser. No data is sent to a server.
- Does it handle different time zones?
- Yes. It shows the time in your machine's local zone alongside UTC, so you can compare both at a glance without doing the math.
- Why does my timestamp show a strange date?
- Usually the unit is wrong — for example reading a milliseconds value as seconds. Switch the unit and convert again.