Short answer: Namokar Mantra helps purify the mind and life, but it does not magically erase all sins in one go. True cleansing of karmas comes through sustained ethical conduct, right faith, right knowledge, and right conduct, along with regular practices like pranayama, reflection, and sincere repentance.

Key points from Jain perspective:

• Namokar Mantra is a reverent prayer. It praises the Arihants (enlightened beings), Siddhas (liberated souls), and Devas, and it invites humility, self-purification, and devotion to the path.
• It supports spiritual resolve but the shedding of karmas (papa) happens gradually as one lives a Jain code of conduct (non-violence, truth, non-stealing, celibacy, non-possessiveness) and engages in penance, pratikraman (repentance), and disciplined living.
• There is a common practice across traditions, but the emphasis and accompanying rituals can differ between Digambar and Shvetambar communities. The core idea remains the same: sincere intention and disciplined practice lead to purification and eventual liberation.

If you’d like, I can give you the exact Namokar text and explain its meaning line by line from authentic Jain sources, and note any differences between Digambar and Shvetambar interpretations.