expression
there is no need to; it is fine if you don't; unnecessary
Follows a verb (dictionary form or 〜する必要) to say that an action is not required. Often used to politely decline an offer or to reassure someone.
わざわざ来るには及ばないよ。
There's no need for you to come all the way.
心配するには及びません。
You don't need to worry.
expression
does not match; out of reach of
Follows a noun to indicate that something is not comparable or cannot reach the level of that noun. Often used in the pattern 〜には及ばない to mean 'cannot compare to' or 'is no match for'.
彼の実力はプロには及ばない。
His ability is no match for a professional's.
この映画は原作の面白さには及ばない。
This movie doesn't match the fun of the original work.