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Library Software - catalog your book library

Automatically download book details and imagesLike author, title, publisher, genres, subjects & cover art.
Just search our huge online book database ... ... by ISBN or by author & title.
Over 40 million ISBNs recognizedGuaranteed 97% success rate on your ISBN searches!
For your phone
  • Available for iOS and Android
  • Built-in camera barcode scanner
  • Sync data with the Movie Connect software
For your computer
  • For Windows, macOS, Linux, chromeOS, etc.
  • Use with the free CLZ Barry barcode scanner app
  • Sync data with the CLZ Movies mobile app

Or... use them both, as perfect companions!

Both CLZ Books and Book Connect can be used on their own, as a stand-alone solution. But these tools really come to life when used together, as they are great companions.
While away from your computer use CLZ Books on your phone, then use Book Connect at home, to work on your database on a big screen, with a real keyboard.
Of course, you can sync your database between them through our CLZ Cloud solution.

CLZ Books
1 year
Book Connect
1 year
USD $0.00
USD $0.00
save USD $0.00

Also still available: Book Collector for Windows

Book Collector is our legacy desktop software. Old-skool software that you install on your own computer, with your data stored locally.
Using Book Collector is only recommended for advanced Windows users, who know how to install/update software, manage folder and file permissions, configure firewall/security software, make their own backups, etc...

Learn more about Book Collector

Latest software updates

The app does a great job of keeping track of my library. It's easy to add books, and to keep everything synced with my CLZ account in the cloud. Great support as well. I recently had an issue with the app (I couldn't add a new book), and the support team worked with me until the problem was resolved. — Tim Kynerd (Sweden) on June 17, 2024

Reviews from customers

June 11, 2024
Easy to scan and upload
Started with CLZ on the computer storing all the wife's books in her library, after a few walks back and forth II downloaded mobile app and haven't looked back, easy to scan and upload. — Douglas Berwick (Australia) on CLZ Books
April 27, 2024
Outstanding Library Organizational Tool! — Roburt Coates on CLZ Books
April 15, 2024
Great software
I’m a long-time user of Music Collector, thought I should finally catalog my book and music score library. That 7-day trial with Book Connect has made data entry much easier. Once I get my collection in, the mobile app will probably serve my purpose. We’ll see!
Thanks for the great software. Feeds my OCD challenges. — Dennis R. (USA) on Book Collector
October 26, 2023
Good App
Good app, finds almost all books via the bar code otherwise it can be added manually. Great asset to not buy books twice when your library grows and your cannot memorize each item. — duzbigalo (Germany) on CLZ Books
August 21, 2023
Very useful
I've started the trial for the cloud version and the desktop version to see which I prefer. I might end up using the cloud version but still keeping the app on my phone as well as it's just more user friendly when in a book shop to open and check my library list.
Honestly out of all the apps I've used this one has been the easiest to get used to, add books to and navigate. As I've now gotten too many books that fit in my apartment I've found that it will be very useful to keep catalogues of what's in storage, what's in the apartment and what I keep at my office and lend out. — Monique Gomez (Australia) on Book Collector
June 08, 2023
Quick to get organized
Took a few days to figure out How To, but once I self -learned, it's so quick to get my library organized. — Susan T on CLZ Books
May 28, 2023
Fantastic product
Fantastic product that also has fantastic customer service support if needed. Direct support provided by savvy engineers included in license purchase. A great asset having your library in you pocket, always backed-up to the cloud! — birdwriter1 (United Kingdom) on CLZ Books
May 28, 2023
Easily 5 stars
Makes tracking your book library as easy as it could possibly be. — Gary Pierce on CLZ Books
February 20, 2023
Great way to keep track of my written library. — Morg Jones on CLZ Books
January 04, 2023
My llbrary
Great way to keep track of my library. — Bruce Thacker on CLZ Books
August 17, 2022
Great app, great team!
I have been using this app for at least four years. The use is intuitive, the acquisition system is quick and the database is extremely well-stocked. The cards have an incredible variety of data with high customization. Furthermore, the support in case of need has always been fast and decisive. I highly recommend it for those who want to keep their library in order. — MattiaLusetti8519 (Italy) on CLZ Books
July 30, 2022
Your library in your pocket
User friendly app to keep track of books, music, and more. Know what's in your media library and avoid duplicate purchases. You can even create a wish list for items to add to your library. Works on a desktop computer as well as a smart phone. — CB Youngblood on CLZ Books
May 22, 2022
Perfect to keep track of everything
Downloaded the trial and started adding books, upgraded to yearly subscription within 1/2 hour! Most of my library is packed away for a bigger house so this app is perfect to keep track of everything I have and don't have as I keep going with my collection. The book Nerd and organiser in me LOVES this app! — Lozzerella (USA) on CLZ Books
May 18, 2022
Love it
So easy to use! So great to finally be able to catalog our library..and find when we have more than one copy of something! — Mary Priestley-Fine on CLZ Books
May 06, 2022
Book library
I recommend Collectorz to all the collectors I know and my father-in-law loves it for keeping track of his extensive book library. — Linda Fay (United Kingdom) on Book Collector
March 29, 2022
Love Book Connect
Many thanks as always for your kindness and generosity. I have always appreciated working with you.
A real blessing to me to keep my library in shape. You have a GREAT product in Book Connect, and I can be assured that all your other offerings have the same high degree of excellence.
At age 82, I really appreciate the simplicity and completeness of Book Connect. — Larry Gilliland (USA) on Book Collector
February 26, 2022
Book Collectorz is one amazing application!
I've been using it now for a few years to manage a 1000 book library collection for my quilt guild. What I really love is that the Collectorz team is constantly making improvements to the app that make it easier and faster for the user to manage their collection. The team is responsive and genuinely interested in what their users have to say about the program. The app is simple to use, and very intuitive. You can slice and dice your collection in any way you want to see what you have, and there are a lot of customizable fields if you have specific interests. The connection to "core" is flawless, and simply by putting in the ISBN from the back of a book you get all the information you need in seconds. The price is very reasonable for the value you get from this app.
While I haven't used their other products, I'm sure they are just as refined and useful. Thank you CLZ team, great job! — Mary Pimentel-Wheeler (USA) on Book Collector
January 27, 2022
Great App Organizer
I am an avid reader and collector. I never thought to have a catalog system for my books. After using this app to get an idea of my library, I found that I purchased several books twice. Donated those to the local library. — Sherlocked61 (USA) on CLZ Books
January 03, 2022
Great tool for your library
Just started with the app. Very user friendly and gives you clear overview of your book library in various views, along with some other characteristics of each of your books. — Ad Kolsters on CLZ Books
December 09, 2021
Accurate and user-friendly
This is an excellent app that provided me with the means to create a decent inventory of a small school library. It is very accurate and user-friendly and I am able to create new titles, link existing ISBN's and access my numbers instantly. Highly recommended. — Stephan E on CLZ Books
December 05, 2021
School library
We have catalogued our full school library this year and found the Connect platform to be very useful. Our favorite feature is the picture of the cover of the books. Teachers can quickly identify what they are looking for from our printed index. We're excited for our library to grow. — Kari O'Connor (USA) on Book Collector
November 15, 2021
Great Tool, Easy to Use, Cross Platform!!
Love this app! I’ve been using it for several years and it just gets better and better. I volunteer at the Friends of the Poway Library Bookstore, and recommend it regularly to patrons. Like it so much I also bought licenses for their Movie App which I also love! Running both on my PC, iPad and Samsung Galaxy Note 8 phone and they sync flawlessly. Updates are quick and easy and support is really impressive. I wish more Apps worked this well and had this level of support! — Bob in Poway (USA) on CLZ Books
November 04, 2021
Works like a charm!
We use this as the card catalog for our retirement community library. — Louise Whealton on CLZ Books
September 21, 2021
Does it all. Cover to Cover
I had tried a few catalogue apps for my book collection. Most were okay, but they didn’t do everything I wanted, or they were too difficult to manoeuvre through, or just too expensive. Then one day, about 7 or 8 years ago, the one I was using just quit working. I couldn’t even get into it to export what I had already entered in. I went online and found out that it was done, no longer supported, and no questions would be answered. So I went online and started looking. It didn’t take long. I found a reference to Book Collector. This was an app that I could download and it looked like it would everything that I wanted. It was a reasonable price, and so I decided to give it a try.
FABULOUS ! FABULOUS ! FABULOUS ! It does everything I need, and does it well, and smoothly, and with over 3500 books on my shelves, that’s important. Since then I have switched to their cloud service, CLZ Books. I no longer have to use my memory space. I just log in, make entries, deletions or changes and it’s done. The price is still very reasonable. This is the best book cataloguing service of any I have ever used. They also offer apps or cloud service for collectors of Movies, Music, Comics and Games. This team of developers has done and continues to an outstanding job. I would 100% recommend this to anyone who has a library to keep track of. — Ti-Cat Matt (Canada) on CLZ Books
September 20, 2021
Like a Personal librarian, great support!
I have been in the process of moving house and clearing out a family storage unit, thrilled with the books I’m finding, remembering and hoping to organize them all into a great library. I was seriously thinking of hiring a librarian to help me with all this when I found this fabulous app. I am able to seamlessly add volumes by isbn numbers and have manually added obscure volumes, photographing the covers and noting their particular histories.
I have been so eager with the newly discovered app, trying to get up to speed, I quickly asked support for some features that I subsequently discovered on my own. I was pleased to get an equally quick answer to my query— how to print out my lists— and can’t wait to do more. I may still hire someone to help me but with this app I am assured that even a student will be able to do a thorough, professional organizing of my library.
Bravo! Six stars! — intensia (USA) on CLZ Books
August 30, 2021
Textbook catalog
I am trying to catalog my husband’s library of about 2500 textbooks in different languages. I searched all over the web and finally came upon CLZ. This sounded just like what I needed. I emailed them to inquire about this and got a positive answer in less than 24 hours. We bought the app and I started to catalog all the books. By now I have entered about 1150 and moved to the cloud. Every time I had a question I got an answer in less than 24 hours. Their support staff is excellent. This is really a great app and I couldn’t be happier with it. I highly recommend it to anyone who tries to catalog their libraries. — ollldie on CLZ Books
August 09, 2021
Highly recommended
Easy to use, extremely detailed app that allows me to keep my library nice and organized... not to mention, keeping me from buying the same book more than once. Highly recommended. A++ — Rodrigo Mendonça on CLZ Books
July 26, 2021
I love this app
It helps me to keep my library in order and keeps me from buying the same book twice. I want to give a special shout out to Alwin in support for working with me to fix some issues that I had. Great support and great app!! — Morgan Holmes on CLZ Books
July 22, 2021
Absolutely superb
I am a professional library worker and this app holds its own against our system. Love the way you can adapt it to your own individual needs. — A Google user on CLZ Books
July 01, 2021
Love this app!
I use CLZ books to manage my quilt books library. It helps me avoid buying duplicates which is good for my wallet. It’s also easy to add new purchases to the collection. Thank you, CLZ, for keeping me organized!! — JCquilter on CLZ Books

Read more reviews from customers