Yes—sweet lime (mosambi) juice is generally permissible for Jain householders, with care for ahimsā and cleanliness.

Simple guidelines

• Only in daylight. Avoid after sunset.
• Freshly extracted and consumed soon. Do not store. Many follow a limit of about 1 prahar (~3 hours) from preparation; some are stricter in Chaumās/Paryushan (within 48 minutes–1 hour).
• Filter well (cloth/strainer) to avoid tiny life-forms. Do not add ice from unfiltered water.
• Keep it simple: no honey, no fermentation, no mixing with many ingredients.
• Prefer not to crush seeds; use clean utensils and check fruit for infestation.

Festival/vrat notes

• During Parv (e.g., Paryushan/Das-Lakshan), follow your own pachchakkhān (vow) and local maryādā. Some take simple fruits/juices; others avoid them depending on the vow (e.g., Ayambil, only-boiled-food, or only-water fasts). Guidance for fruits (includes sweet lime) is here:
• If observing Ayambil, juices are not taken.

Digambar and Shvetāmbara

• For lay Jains in both traditions, the above daytime, freshness, and non-violence rules are the same. Monastics follow much stricter rules and generally do not take such juices outside their prescribed gochari/maryādā.

For the broader lay vows that underlie these practices (e.g., not eating at night, carefulness in food), see: