【CSS】@keyframesを使用してテキストを一文字ずつバラバラにスライドしながらフェードインさせる方法のデモページ

$(function(){
  $('.text').children().addBack().contents().each(function() {
    $(this).replaceWith($(this).text().replace(/(\S)/g, '<span class="text-move"<$&</span<'));
  });
  $(".text").addClass("active");
});

<div class="wrap">
  <p class="text">DummyText01</p>
</div>

.wrap {
  width: 768px;
  margin: 100px auto 0;
  text-align: center;
}

.text {
  opacity: 0;
  font-size: 50px;
}

.text-move {
  display: inline-block;
  animation: move .8s ease both;
}

.text.active {
  opacity: 1;
}

@keyframes move {
  from {
    opacity: 0;
    transform: translate3d(-20px, 0, 0);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.text-move:nth-child(1) {
  animation-delay: 0;
}
.text-move:nth-child(2) {
  animation-delay: .2s;
}
.text-move:nth-child(3) {
  animation-delay: .4s;
}
.text-move:nth-child(4) {
  animation-delay: .3s;
}
.text-move:nth-child(5) {
  animation-delay: .5s;
}
.text-move:nth-child(6) {
  animation-delay: .4s;
}
.text-move:nth-child(7) {
  animation-delay: .5s;
}
.text-move:nth-child(8) {
  animation-delay: .4s;
}
.text-move:nth-child(9) {
  animation-delay: .5s;
}
.text-move:nth-child(10) {
  animation-delay: .2s;
}
.text-move:nth-child(11) {
  animation-delay: .4s;
}
.text-move:nth-child(12) {
  animation-delay: .5s;
}

@media screen and (max-width:640px){
  .wrap {
    width: 100%;
  }
}