Short answer: In Jainism, viewing pornography is considered a sin (paap) and is strongly discouraged.

Key points:

• Core reason: It inflames passions (raagha, kashayas), strengthens attachment to sensual pleasures, and leads to karmic bondage. This goes against the aims of ahimsa (non-violence) to living a calm, pure mind.
• For monks and nuns: Any sexual thought, sight, or act breaks brahmacharya (complete celibacy) and is strictly forbidden.
• For lay Jains (householders): It is a transgression of the brahmacharya anuvrata (the vow of chastity within limits). It is avoided as it disturbs mind and spirit, and creates unnecessary karmic influx.
• Practical path: Pray for self-restraint, practice samayik (meditative intervals), pratikraman (confession and repentance), svadhyaya (study), and keep strong boundaries to reduce triggers. Cultivate aparigraha (non-attachment) and mindful living to reduce sensual agitation.
• Tradition note: Both Digambar and Śvetāmbara traditions uphold the importance of brahmacharya for ascetics and encourage restraint for householders; pornography is not considered a permissible or beneficial practice in either tradition.

If you want, I can point to Jain teachings and practical vows that discuss brahmacharya, samayik, and anuvrats in more detail. You can read more here