Use v-html directive:

<div class="columns medium-4 large-4" v-for="keyOffer in keyOffers">
  <p>{{ keyOffer.head }}</p>
  <p v-html="keyOffer.sub"></p>
</div>

Ref: RawHTML

Here is a simplified solution:

1- Put your JSON data in a file called data.json in the src/ directory.

2- In the Vue component EstepeJson.vue inside the script tag import the JSON file:

import json from "@/data.json"; 

3- Then in that same file EstepeJson.vue add the data to a data property like this:

export default {
  name: "EstepeJson",
  data() {
    return {
      myJson: json,
    };
  },
}; 

4- In the same file EstepeJson.vue inside the html tag add this:

<template>
 <div v-for="data in myJson" :key="data.Cod">
    <p>{{ data.Title }}</p>
    <p>{{ data.Cod }}</p>
    <p>{{ data.Description }}</p>
    <p>{{ data.Technical_characteristics }}</p>
  </div>
 </template>

here is a live code example: https://codesandbox.io/embed/crazy-shadow-01ex0w?fontsize=14&hidenavigation=1&theme=dark

5- If you are trying to fetch the JSON data from an endpoint send me the URL and I will write the code for you using Axios, and send a sandbox example for you to explore.

Just use v-html

<template>
<h1>Posts</h1>
<div v-for="post in posts" :key="post.id" class="posts">
    <h2> {{ post.title.rendered }} </h2>
    <div v-html="post.content.rendered"></div>
</div>

use this code:

<div id="vueapp">
  <textarea v-model="jsonstr" rows="8" cols="40"></textarea>
  <pre>{{ jsonstr | pretty }}</pre>
</div>

and JS:

new Vue({
  el: '#vueapp',
  data: {
    jsonstr: '{"id":1,"name":"A green door","price":12.50,"tags":["home","green"]}'
  },
  filters: {
    pretty: function(value) {
      return JSON.stringify(JSON.parse(value), null, 2);
    }
  }
})

Well, you will have to add the code that you have written for Vue

If you are in a vue app, you can do something like this

<script>
      import json from './json/data.json'
      export default{
          data(){
              return{
                  myJson: json
              }
          }
      }
</script>

and if you are writting it inside an html page. you can do it in 2 steps.

1st is to add the file link as a script

<script src="../file.json"></script>

then in the vue script section you can assign it to the data object.

var ele = new Vue({
     el : "#YourElement", 
    data : ObjName
});

"ObjName" is a name of the json object in the file.

ObjName :
{
"data": [
    [
        {
           "account_id": "  "
           "account_name": "   "
        }

Assign the import to a data property

<script>
      import json from './json/data.json'
      export default{
          data(){
              return{
                  myJson: json
              }
          }
      }
</script>

then loop through the myJson property in your template using v-for

<template>
    <div>
        <div v-for="data in myJson">{{data}}</div>
    </div>
</template>

NOTE

If the object you want to import is static i.e does not change then assigning it to a data property would make no sense as it does not need to be reactive.

Vue converts all the properties in the data option to getters/setters for the properties to be reactive. So it would be unnecessary and overhead for vue to setup getters/setters for data which is not going to change. See Reactivity in depth.

So you can create a custom option as follows:

<script>
          import MY_JSON from './json/data.json'
          export default{
              //custom option named myJson
                 myJson: MY_JSON
          }
    </script>

then loop through the custom option in your template using $options:

<template>
        <div>
            <div v-for="data in $options.myJson">{{data}}</div>
        </div>
    </template>

You'd have to do JSON.parse(conversations.messages[0]).text. This way you parse the object inside messages and have access to its properties.

use this code:

<div id="vueapp">
  <textarea v-model="jsonstr" rows="8" cols="40"></textarea>
  <pre>{{ jsonstr | pretty }}</pre>
</div>

and JS:

new Vue({
  el: '#vueapp',
  data: {
    jsonstr: '{"id":1,"name":"A green door","price":12.50,"tags":["home","green"]}'
  },
  filters: {
    pretty: function(value) {
      return JSON.stringify(JSON.parse(value), null, 2);
    }
  }
})

You have to iterate over responders.data as it is the array you have to loop and than you can just access userReference like: {{responder.userReference }}. You should be able to do it like following:

<div id="app">
    <ul class="list-group">
        <li v-for="responder in responders.data">{{ responder.userReference }}</li>
    </ul>
</div>