JikOBook is a multilingual online catalogue designed to help readers discover books and explore the people and publishing details connected with them. Its catalogue brings together records for titles from a wide range of languages, including Persian, English, German, French, Arabic, Spanish, Chinese, and many others. Book entries can include authors, original-language titles, translations, publication or printing information, and verified records.

Visitors can browse by people, series, publishers, genres, tags, moods, recent changes, or recently added books, and explore lists such as readers’ favorites, most visited titles, and books found on the most shelves. JikOBook also supports reader participation through recommendations, ratings, likes, and reviews, allowing users to share their responses to books. Mood-based discovery offers options such as adventurous, reflective, funny, mysterious, or relaxing, while adjustable text size and light and dark display modes support browsing preferences.

The site provides account registration and sign-in, and presents its catalogue in numerous interface languages