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Otzar Online


Description of the online version

Otzar HaHochma is proud to announce the launch of 'Otzar Online'!

Direct access at https://www.otzar.org/wotzar/otzar.aspx.

or at www.otzar.org. Click the button  

Free trial

Visit Otzar Online as a guest: click here.

You will be able to view first 40 pages of each book.


The main Otzar HaHochma editions for the online versions for individuals

Complete Otzar HaHochma – 74,800 books

The variety of topics in Otzar HaHochma includes all Jewish fields, including:

Bible and its Commentaries.

Tannaitic literature including Mishnah, Tosefta, Midrash Halakhah and Aggadah as well as their Commentaries.

Talmudic literature from both Babylonian and Jerusalem Talmuds and their Commentaries, as well as Geonic works.

Halakhah and Customs from the Rishonim and Acharonim, as well as Responsa Literature.

Jewish Philosophy from medieval times to the modern period.

Kabbalah and Hasidism including liturgical writings, sermons.

Modern scholarship in Jewish history, Hebrew linguistics, Jewish psychology, family studies, information science, etc.

Torah compilations, memorial volumes, prayer books, and much more.

School online version – 13,000 books

The new Otzar HaHochma School version comprises 13,000 Judaic books including: basic works in all Torah and Judaic fields, from Chazal to modern day sources, commentaries to the Bible, Mishnah and Talmud, works in Jewish philosophy and mussar; in addition to books on Jewish history and Jewish communities, Hebrew language and grammar, encyclopedia's etc. The version caters to the needs of teachers and students. Otzar HaHochma serves as a useful aid in preparing lessons, source sheets; and projects and assignments of students, in all Judaic fields.

Kehot Publication Society (Chabad library)
+ Basic works - 5,360 books

An extensive collection of Chabad publications throughout the generations, including ancient and rare books, as well as most of the basic Chasidic sources, Torah files, tributes, history books, and albums. The collection was made possible through the generous assistance of Kehot Publication Society. In addition important basic works are included.


Additional packages (Supplementary to main editions):

Mosad Harav Kook – 1056 books

Books from the important publisher – basic works in all Torah fields in precise and uptodate editions: Chidushei HaRitva, Rashba, Ran, Tosafot HaRosh, Mefarshei Hamikra Harishonim series, Torat Chaim series, Torah Umegilot, Tshuvot HaGeonim, Rishonim and Acharonim, Daat Mikra on Nach series, hagut and mussar, piyut and tefila, research and bibliography, history, Hebrew Linguistics and much more.

Machon Yerushalayim – 496 books

This unique package from a leading publisher of Jewish religious publications includes 405 books from Rishonim and Acharonim; for example:Otzar Mefarshei Hatalmud, Shulchan Arukh Hashalem, Sidrat Tshuvot Harishonim, Minchat Chinuch Hashalem, Noda Beyehuda Responsa, Sidrot Gedolei Ashkenaz, Hungary, Lithuania, Poland, Ohr Hamizrach and more.

Machon Chochmat Shlomo - 121 books

Approximately 121 works from the greatest sages of all generations, prominently featuring the incredible collection from the overflowing fountain of wisdom of the Gaon Rabbeinu Shlomo Kluger from his manuscripts, his halachic responsa, his commentary on Shulchan Aruch, his novellae on Shas, 22 volumes on Torah, drashot for holidays and on the megillot; as well as the works of HaGaon HaRav Yosef Shaul Nathanzon, author of 'ומשיב שואל' on Torah and the holidays; the works of Rabbi Yaakov Orenstein, author of "יעקב ישועות" on Shas; the works of Maharam Chaviv’s halachic responsa and drashot, and many, many more. All the works are edited and layed out clearly and tastefully.

Ahavat Shalom Publishers– 546 books

546 books of the Ahavat Shalom Publishers, including important books in all Torah branches most of which are first published from manuscripts. Also include famous and highly accurate editions of well known important books, for example: the Toraht Harishonim, Shas commentaries,the works of the Ari z”l, and more.

Machon Ofek - about 64 books

About Machon Ofek

A collection of over 80 works from the times of the Geonim, Rishonim, and outstanding Acharonim, all of which are based on newly discovered manuscripts, accurately deciphered and edited in accordance with the highest Torah and critical standards. These works are accompanied by annotations, comprehensive commentaries, critical introductions and detailed indexes. Among them are: מפעל תורת כהנים ומפרשיו הגדולים, תשובות רב נטרונאי בר הילאי גאון, תשובות הגאונים החדשות, אוצר הגאונים החדש על מסכת בבא מציעא, סידרת חיבורי ראשונים על מסכתות ה תלמוד: תוספות י"ר הזקן ותלמידו על מסכת שבת יד, על רמה מסכתות גיטין וקידושין, שיטה מקובצת על מסכת חולין, תוספות על ש“הרא וחגיגה פסחים מסכתות, etc., as well as works on Tanach from our greatest Rishonim, such as Rashi and Rabbenu Tam, and many other specialized works on various subjects. This package also includes Ofeq's outstanding facsimile edition of Rambam’s Mishneh Torah—Mada v’Ahava, Oxford's high-prized manuscript Huntington 80, famously known as “the authorized version,” with a scholarly introduction of book-length, and appendices: holographs of Rambam, and incunabulum of Mishneh Torah.



Otzar HaHochma is continuously expanding its library. Our vision is to encompass the maximum number of Judaic books available. Furthermore, our IT professionals are constantly refining the program and its search engine. The online version is updated automatically. Currently the total number of books available in the Online versions is greater than the hard disk version.

The fee is on annual base.


Technical requirements for Otzar Online

Otzar Online can be used by both Windows and Macintosh users with an internet browser. Otzar Online is best experienced with a fast internet connection and modern browser with a minimum screen resolution of 1024 by 768 pixels and 32-bit color.

We recommend using one of the following browsers:

All of these browsers have free updates available online.

Please be sure to have JavaScript enabled in your browser. Your operating system must have Hebrew fonts installed to be able to view the Hebrew text on the site.

Users with a dial-up connection may find that loading times for books are very slow. Any speed DSL or cable connection is sufficient for optimum performance.


The license agreement

The use of Otzar HaHochma's Online versions are permitted according to the user license. In order to view the entire user license, Click here.


The Rabinnical survey

The books are suveyed by Rabbinical authority on behalf of Rab. Shmuel HaCohen Deutch, Rosh Yeshivat Kol Torah.


Pricelist and payment

In order to purchase a user license to 'Otzar Online', please visit our online store.

The Online Store (credit card only).