Regular - how to escape quotes?

Question

Regular Expressions

Good afternoon.
In Notepad++ in HTML, you need to find and replace quotes for all attributes with quotes with a screen, of course, and preserving the
Essence value, so that it turns out like this:

It was

<meta name="format-detection" content="telephone=no">
  <meta name="robots" content="noodp, noydir">
  <meta name="HandheldFriendly" content="true">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">

It became

<meta name=\"format-detection\" content=\"telephone=no\">
  <meta name=\"robots\" content=\"noodp, noydir\">
  <meta name=\"HandheldFriendly\" content=\"true\">
  <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">

Tried in the search: ="(.*)"
To replace: =\\"$1\\"
As a result, it turns out that it works only 1 time per line, i.e. if the tag has more than one attribute, it sets the first one to open and the last one to close

What happened in the end (palm face)

:

<meta name=\"format-detection" content="telephone=no\">
  <meta name=\"robots" content="noodp, noydir\">
  <meta name=\"HandheldFriendly" content="true\">
  <meta http-equiv=\"X-UA-Compatible" content="IE=edge\">

Lack of knowledge to fix this

Answer 1

="(.*)"
here is an error. The idea is this:
https://regexr.com/3u369
replace the dot with the expression "alphabetic characters".
And even better - to negate the double quote.
I don’t know what regexp notepad++ uses, it seems to have its own quirks.