にとって details

Examples

for N; from N's standpoint — a stative or evaluative judgment viewed from N's side

それ、私わたしにとってはけっこう大おおきい問題もんだいだよ。

sore, watashi ni totte wa kekkou ookii mondai da yo.

That's actually a pretty big problem for me. casual

子供こどもにとって、親おやの期待きたいはときに重おもすぎる。

kodomo ni totte, oya no kitai wa toki ni omosugiru.

For a child, a parent's expectations are sometimes too heavy a burden. neutral

本製品ほんせいひんは、初心者しょしんしゃの方かたにとって特とくに使つかいやすい設計せっけいとなっております。

honseihin wa, shoshinsha no kata ni totte tokuni tsukaiyasui sekkei to natte orimasu.

This product is designed to be especially easy to use for beginners. formal

にとっては (contrast) and にとっても (even/also) attach freely with no change to the core meaning — 私にとっても大事だ "it matters to me too."

ために
Both can translate loosely as "for N," but they mark different roles — にとって supplies the STANDPOINT a stative judgment is viewed from (子供にとって大切だ "important from a child's viewpoint") and cannot mark purpose (合格のために勉強する "study in order to pass" needs ために, never ×合格にとって勉強する); ために's beneficiary sense CAN modify a stative predicate too (健康のために大切だ "important for the sake of health"), but names who benefits, not whose viewpoint is taken — it can't supply にとって's standpoint reading, and an action verb (働く, 頑張る) can only take ために, never にとって.
として
Both put a noun in a relational frame before the predicate, but として names the capacity in which the referent COUNTS or acts — action or state alike (医者として働く "work as a doctor", 古都として有名 "famous as an ancient capital", 代表として選ぶ "choose as the representative") — while にとって requires the noun to be the party a stative or evaluative judgment applies to (医者にとって難しい "difficult for a doctor"); neither substitutes for the other.

に対して
Learners routinely misread these as interchangeable ("toward/for N") — に対して marks the target an action or attitude is DIRECTED at (子供に対して厳しい "strict toward children" describes behavior aimed at them), while にとって frames the noun as the vantage point a judgment is made FROM (子供にとって難しい "difficult for children" describes how it looks from their side); swapping them either drops the directedness or invents a standpoint that isn't there.