i would like to know whether reading quran without tajweed is wrong?
Tajweed and correct pronunciation is very important for the recitation of the Glorious Qur’aan, as a single mistake would change the whole meaning. Sometimes this changing of meaning leads to Kufr and Shirk and invalidates the Salaah, if such mistake is committed in recitation while performing Salaah. Therefore, one should try one’s best to recite the Glorious Qur’aan with Tajweed as Allaah has commanded in Ayaat No. 4 of Surah Al-Muzzammil.
Negligence in this regard is unjust and will cause Allaah’s wrath because of violating His command.