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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
/* Firefox */
input[type=number] {
  -moz-appearance: textfield;
}
</style>
</head>
<body>
<h2>Hide Input Number Arrows</h2>
<p><strong>Note:</strong> It is still possible to increment the number when you scroll inside the number input.</p>
<input type="number" value="5">
</body>
</html>