How to center multiple divs inside a container in CSS

My previous answer showed a frankly outdated method (it still works, there are just better ways to achieve this). For that reason, I’m updating it to include a more modern, flexbox solution.

See support for it here; in most environments, it’s safe to use.

This takes advantage of:

• display: flex: Display this element with flexbox behaviour
• justify-content: center Align the inner elements centrally along the main axis of the container
• flex-wrap: wrap Ensure the inner elements automatically wrap within the container (don’t break out of it)

_{Note: As is usual with HTML & CSS, this is just one of many ways to get the desired result. Research thoroughly before you choose the way that’s right for your specifications.}

.container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    width: 70%;
    background: #eee;
    margin: 10px auto;
    position: relative;
    text-align:center;
}

.block {
    background: green;
    height: 100px;
    width: 100px;
    margin: 10px;
}

<div class="container">
    <div class="block">1. name of the company</div>
    <div class="block">2. name of the company</div>
    <div class="block">3. name of the company</div>
    <div class="block">4. name of the company</div>
    <div class="block">5. name of the company</div>
    <div class="block">6. name of the company</div>
    <div class="block">7. name of the company</div>
    <div class="block">8. name of the company</div>
</div>

Original Answer

You could apply the style text-align:center; to your container and display your .blocks as inline-block elements:

.container {
  width: 70%;
  background: #eee;
  margin: 10px auto;
  position: relative;
  text-align:center;
}

.block {
  background: green;
  height: 100px;
  width: 100px;
  display:inline-block;
  margin: 10px;
}

<div class="container">
   
        <div class="block">1. name of the company</div><!--
     --><div class="block">2. name of the company</div><!--
     --><div class="block">3. name of the company</div><!--
     --><div class="block">4. name of the company</div><!--
     --><div class="block">5. name of the company</div><!--
     --><div class="block">6. name of the company</div><!--
     --><div class="block">7. name of the company</div><!--
     --><div class="block">8. name of the company</div>
</div>

Here’s an updated Fiddle

Notice I’ve commented out the white-space between your <div>s. Because the elements are now displayed inline, your spaces will be acknowledged. This is one of many ways to ‘fight the space’.