css force string to wrap
// For Block Elements
<textarea style="width:100px; word-wrap:break-word;">
ACTGATCGAGCTGAAGCGCAGTGCGATGCTTCGATGATGCTGACGATGCTACGATGCGAGCATCTACGATCAGTC
</textarea>
// For Inline Elements
<span style="width:100px; word-wrap:break-word; display:inline-block;">
ACTGATCGAGCTGAAGCGCAGTGCGATGCTTCGATGATGCTGACGATGCTACGATGCGAGCATCTACGATCAGTC
</span>
// Another thing to try:
<tr style="overflow-wrap: anywhere"><td>1</td><td>2</td></tr>
