In Jainism, there isn’t a single universal “mantra for negative karma,” but there are time-honored practices and short prayers that help reduce and purify negative karma through repentance, forgiveness, and disciplined conduct. Here are simple, authentic options you can use:

• Micchami Dukkadam (also spoken as Michhami Dukkadami)

- Meaning: May all beings be free from malice; may I have forgiven any harm I may have caused, knowingly or unknowingly. - Use: Say this sincerely at the end of a day, after conflicts, or during rituals of forgiveness. It helps purify intent and reduce harm done to others.

• Kshamavani (Forgiveness Prayer)

- General idea: Acknowledge that you may have caused hurt, and ask for forgiveness from all living beings, including the Tirthankaras, sages, and other beings. - Use: Recite as a short, heartfelt confession during pratikraman (the ritual of repentance). It’s a traditional way to cleanse negative karma by removing irritation, ego, and misintent.

• Pratikraman (ritual of repentance)

- Not a single mantra, but a structured practice of reflection, confession, and resolution to avoid repeating mistakes. - Use: Regularly (daily if possible) perform pratikraman, review your thoughts and actions, repent for faults, and resolve to practice non-violence (ahimsa), truth (satya), and non-possessiveness (aparigraha).

• Samayik (period of concentrated spiritual reflection)

- A shorter, focused practice to calm the mind, reduce negative thoughts, and align actions with vows. - Use: Set aside time (usually 48 minutes) for meditation, reflection, and self-discipline to lessen karmic buildup.

• Positive practices that help burn or counteract negative karma

- Forgiveness: Actively forgive others to lessen your own karmic burden. - Non-violence in thought, speech, and action: Practice ahimsa in daily life. - Detachment and self-control: Reduce attachments and ego that fuel negative karma. - Honest living and compassion: Service to others and mindful conduct reduce future karmic influx.

Notes on tradition:

• Digambar and Shwetambar traditions share these core ideas, but there can be slight differences in wording or emphasis for certain prayers. The essential purpose remains the same: purify, forgive, and align actions with Jain vows.

If you’d like, I can provide the exact traditional texts for Kshamavani and Micchami Dukkadam (in the original language and a simple meaning), or guide you through a short, personalized pratikraman sequence.