See request time in Chrome developer tools

Question

During ajax development, I often need a way of seeing the time a request was sent in Chrome developer tools. Either an absolute time (such as 3:45:23 PM) or a relative time (4.56s since page load) is fine.

The closest I can find is the timeline in the Network tab, showing the Start Time (you can click on the Timeline header to select which info it is showing), but you can often only get from it to the nearest 20 seconds:

Answer 1

Add custom column to request table.

1. Right click on column header with request list. In context menu with columns select Response Headers => Manage Header Columns...:

2. Add custom column header with value "Date"

3. Result

Answer 2

You just need to click on the request row:

Right Click > Copy > Copy All as HAR

Then open the HAR file:

{
  "log": {
    "version": "1.2",
    "creator": {
      "name": "WebInspector",
      "version": "537.36"
    },
    "pages": [],
    "entries": [
      {
        "startedDateTime": "2018-08-24T18:34:12.564Z",
        "time": 84.96354891383089,

There is the exact request timing info.