Convert Unix timestamp to Date time with JavaScript

The Unix timestamp value conversion with JavaScript mainly requires when the API request response contains the date time value in Unix format and requires to show it on the screen in user readable form.

Convert Unix timestamp to Date time with JavaScript


  1. HTML & Script
  2. Demo
  3. Conclusion



1. HTML & Script


I created a textbox and a button which call convert() function when gets clicked.

Show converted date time value in <span id='datetime'>.

<input type='text' value='1490028077' id='timestamp'>&nbsp;
<input type='button' id='convert' value='Convert' onclick='convert();'>

<span id='datetime'></span>


Define a convert() function.

From the function perform the following actions –

  • Get inputted Unix timestamp value from the textbox.
  • Define a months_arr Array which is being used in creating formatted date.
  • Convert the value from seconds to milliseconds by multiplying it to 1000 and create a date object.
  • Use inbuilt methods to get year, month, day, hours, minutes and seconds.
  • Set the formatted date time value to <span> element.
function convert(){

 // Unixtimestamp
 var unixtimestamp = document.getElementById('timestamp').value;

 // Months array
 var months_arr = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];

 // Convert timestamp to milliseconds
 var date = new Date(unixtimestamp*1000);

 // Year
 var year = date.getFullYear();

 // Month
 var month = months_arr[date.getMonth()];

 // Day
 var day = date.getDate();

 // Hours
 var hours = date.getHours();

 // Minutes
 var minutes = "0" + date.getMinutes();

 // Seconds
 var seconds = "0" + date.getSeconds();

 // Display date time in MM-dd-yyyy h:m:s format
 var convdataTime = month+'-'+day+'-'+year+' '+hours + ':' + minutes.substr(-2) + ':' + seconds.substr(-2);
 document.getElementById('datetime').innerHTML = convdataTime;


2. Demo

Enter a valid UNIX timestamp value and click the button.


3. Conclusion

You can either convert your Unix timestamp value on the server side while returning response or you can use above script to do on the client side.

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