Which mantras can be chanted without initiation?

Powerful mantras that can be chanted by everyone without initiation:

  1. Bhagavan Naam: The name of your ishta devata may be chanted without initiation. For example – Shivaye Namah, Krishna-Krishna, Durgaye Namah, Bhiaravaye Namaha, and so on.
  2. Ram mantra: The essence of ‘Rama’ is the same as that of Aum. The word ‘Rama’ contains the seed of fire (Agni), sun (Surya), moon (Chandra), as R-A-M. As per the Upanishads, both are Taraka Brahma (that which can free us from the cycle of birth and death). When you chant, pronounce with emphasis on “a” as “Raam”.
  3. Hare Krishna Mahamantra:हरेकृष्णहरेकृष्णकृष्णकृष्णहरेहरे
    हरेरामहरेरामरामरामहरेहरेHare Krishna Hare Krishna
    Krishna Krishna Hare Hare
    Hare Rama Hare Rama
    Rama Rama Hare Hare
  4. Achyut Anant Govind -A powerful mantra which has even been suggested to doctors to help patients recover and can be chanted by all for general good health and freedom from stress is that of Dhanavantari Bhagavan – avatara of Vishnu Bhagavan, and the giver of Ayurveda.
    अच्युताय नमः
    अनन्ताय नमः
    गोविंदाय नमःAchyutaya Namaha
    Anantaya Namaha
    Govindaya Namaha
  5. For the power of Gayatri mantra – The below verse from the Ramcharitmanas is chanted as a mantra and contains the power of the Gayatri mantra. It has been given by Bhagavati Sita Mata and can be chanted by everyone. To increase the power of our intellect we must chant this 32 times in a day. We can also chant it 40 times a day for 40 days to strengthen the power of our mind.जनकसुता जग जननि जानकी। अतिसय प्रिय करुनानिधान की॥
    ताके जुग पद कमल मनावउँ। जासु कृपाँ निरमल मति पावउँ॥4॥Janakasuta jaga janani janaki। Atisaya priya karunanidhana ki॥
    Take juga pada kamala manavaum̐। Jasu krpam̐ niramala mati pavaum̐॥While there might be several more mantras that can be chanted without Guru diksha, the above should be very helpful to start with.