Ways to extend H4 EAD before it's cancelled.

H4 EAD might soon be revoked.

What are the wsywof extending my wife’s EAD?

My I 797, and h1b expires in April 2019. So my wife’s HE and EAD also expires in April 2019.

I can extend my I 797 and h1b, 6 months before it’s expiry. But, I am worried that HE EAD might be revikreby then. Is there a way I can apply for her EAD extension now itself?

No, you cannot apply now.

The H4 and H4-EAD are completely dependent on your H1B visa. It can only be applied for renewal, 6 months before expiration.