There's no kanji for "don't" - Japanese language is not all kanji, it's a mixture of kanji and kana (hiragana/katakana).
For verbs there are kanji but the conjugate part is always in kana.
"To Jump" is 飛ぶ (tobu) or 跳ねる (haneru), depending on the context.
"Don't jump" using 飛ぶ, for instance, can be
飛ぶな
飛ばないで
飛んではいけません
etc., again, depending on the context and situation (who is saying to whom).
If you want something all in kanji, you should try Chinese, not Japanese.