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ISBN Database Software - catalog your books by ISBN

 
Automatically download book details by ISBNLike author, title, publisher, genres, subjects & cover art.
Just search our huge online ISBN 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 live 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

This app takes a bit if getting used to at first, but the catalogue is extensive, and most bar codes and isbn numbers can be used to autofill a good chuck of a collection. — JazzTripp on May 06, 2022

Reviews from customers

May 01, 2022
Was hesistant due to cost, totally worth it
Very impressive database. It's been able to recognize various pre barcode books with no problem based on isbn. — TheWillypedersen on CLZ Books
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
December 16, 2021
Me gusta
El uso simultáneo con el mac y el iphone me da mucha flexibilidad, aunque es más completa la batería de datos del programa para mac. Sencillo de usar, el escaneo de isbn (hay algunos que aún no localiza) es de lo mejor para obtener datos rápidamente. — Lpf64 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
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 10, 2021
Great book catalogue
Love working with this app. Books can be entered by scanning their barcode, so it’s a powerful bookcataloguing system that’s very quick and easy to use. I make heavy use of options that allow you to personalize the settings and stored details, so it’s tailored to my needs.
Over the 7 years that I’ve used this app, I’ve seen lots of improvements. The developers are in-tune with their customers—if we ask for new functionality, it’s actually considered and often implemented. I even had the owner email me when I had an issue! — Kxt213 on CLZ Books
June 02, 2021
Excellent app
An excellent app which is very sophisticated and powerful. A delight to use and Cloud synchronisation is a major asset as is the camera based ISBN scanning and adding feature. — John Pearson on CLZ Books
June 01, 2021
Very Handy!
If you are a book collector (a bibliophile!) then at a certain point you can’t keep an accurate track of your collection in your head. This becomes a problem when you are in a book store, you see something interesting and you really should know if you already have that book, or that particular edition or if the asking price is a bargain or too high. CLZ Books on the iPhone is a perfect way to keep track of not only what you have in your collection but also what is on your “want list” with lots of details. Using a book’s ISBN code, CLZ Books will fill in most of the critical data, including an image of the cover, and it is quite easy to add the missing pieces that are important to you (date of purchase, which bookstore, etc.). All this information sitting there sitting in your phone ready to be tapped into on a moment’s notice. I’ve been a CLZ customer for many years, starting when only a PC version was available. I didn’t choose their program lightly. It was just the best one available at the time. Their constant improvements and their expansion into the Mac world and then onto the iPhone has confirmed that my early adoption was valid and I still am a total fan of their app and believe that the price is a bargain for the product and the service. — jfair3 on CLZ Books
May 30, 2021
Fantastic software for bookaholics - and clubs
I have used the book cataloging software for many years to catalogue the many (many) books we have stored in numbered boxes and bags in our loft. I had also catalogued the books belonging to our local Embroidery group. We wanted to make full use of the group’s books during lockdown and with the superb help of the Collectorz support team, we set up a separate Library and included, on separate sheets, books belonging to members who were willing to loan them out. Until face-to-face meetings resume, we have an ad hoc doorstep delivery system in place, supported by the Loan facility within the software.
The CLZ Barry scanner enables members to scan the barcodes of books they are willing to loan and email the ISBN numbers directly from the App to our Librarian for logging. Subject to Covid restrictions, we can work directly with any member who has as many books as me, to load the books directly. It is particularly helpful to be able to sort on technique, subject etc as well as author and title.
The software works and the support team are easy to contact and really helpful. Highly recommended! — Teresa the embroiderer on CLZ Books
May 27, 2021
Perfect for Organizers!
I love to organize and as a homeschool mom I have nearly 1,000 books. Keeping them organized would be such a chore but this app makes it so easy! I love being able to scan the ISBN of a book to add it to my booklist. And pro tip: if you have lots of older books with no barcode, I’ve found the fastest way to enter them is to go to the keyboard for typing it in, and then click on my microphone and quickly say the numbers. Works great! — GoodHoll on CLZ Books
May 20, 2021
Great Book inventory product
I own over 540+ books and this does a nice database job. I buy a lot of HISTORY books and computer books, this works great to prevent duplicate purchases. When looking at new wish books like the wish list for recall when asked for gift ideas. Like the detail and the book cover pic to compare if purchase or already own. Easily search when shopping especially mobile. Alwin & Team constantly adding new features Via enhancement updates. If there is a problem The Team addresses it very quickly although i have owned for many years and haven’t found too many issues mostly just added enhancements. Highly recommend, cost effective and enjoy it so much purchased several other of his inventory products. Couldn’t add to collections without this product And adding via Title or even better ISBN code is great. App is flexible and allows for cover graphics override so can match exact ownership version. Highly enjoy & Recommend. — Barmeister on CLZ Books
April 25, 2021
A joy to use
I have really enjoyed the use of your products over the years. The Books and Comics in particular made cataloging my collections a whole lot easier to finish and sort. It was really nice that I was able to add most items without having to enter each piece of data separately, like some of the other software out there.
What seemed like an endless task of adding 3500+ paperbacks and hardcover, became a joy to do. The use of a barcode reader just made it that much faster. I still had to manually input a fairly large number of books as they were printed before the barcode system came into being, but even that, for the most part, was reasonably easy to do by using the ISBN. A bit tougher to enter the ones without any ISBN listed, but there the search by title and author made things doable. — Per Olsen (USA) on Book Collector
April 22, 2021
Intuitive and user-friendly
I also wanted to take a moment to thank you for creating the Book Collector software. I have an extremely large book collection that I need to downsize, and I was hoping to find a tool that would allow me to easily catalog my books so I could determine which ones to sell, which ones to bring to the used bookstore, and which ones to keep. I also wanted to capture other details about my books. I discovered your website by pure chance through a Google search, and I am so happy I did since your software does everything I wanted to do (and more)! I having been working with data for 35 years and find that most tools lack the functionality that users would like, but that is not the case with Book Collector. It is very intuitive and user-friendly, and I have been able to figure out how to do something without looking at the manual. The app is a life-saver too since I found it challenging to use my web cam to scan the ISBNs. With the app synchronization, this work is very easy.
Thanks again for the wonderful resources you have created. — Jim V. (USA) on Book Collector
March 08, 2021
Home library
I have a home library of around 350 books, and growing. It was getting to the point where I didn't know which books I owned already. I got CLZ as my home library database and have really enjoyed having it. It's super easy to scan books in or type in the ISBN, and it's easy to search as well. So when I'm at the book store I can quickly see if I already have a book or see what books I'm missing from a particular set. Definitely recommend for anyone with a large home library. — Lauren Rose on CLZ Books
November 15, 2020
Stable and Mature Product
The app was able to easily read bar codes from the last 20 years. Took a little longer with 30-40 year old books. A lot of books had UPC codes and the app easily identifies them. ISBN searches were a breeze. That I could add cover pictures was great. Only complaint: the title search engine is weak. One letter mistake and it couldn’t find a book - “if” instead of “of”. The I and the O are next to each other on my iPhone. But overall I was able to catalogue 99.9% of my more than 1000 books! — The Nomad Reader on CLZ Books
November 02, 2020
Awesome app & excellent support!
I've been using this app for about 2 months, and couldn't be happier. I'm using the app in a slightly unconventional way - not for a personal book collection, but for the school's PTO book collection. The cloud feature of the app allows me to upload all our books, for parents / students to view what's available, and the flexibility of the app allowed me to customize each record to allow for people to select books they wanted.
Populating the app was very simple by scanning ISBN barcodes, and even when a barcode wasn't available, a manual entry was very easy to do. I did do some editing of records to ensure consistency across our database, but this too was very easy. I also edited a number of cover images by adding my own - again very simple a straightforward!
I highly recommend this app. Not only is it comprehensive yet simple, it comes with a first class support team. On occasions when I have had questions, I have dealt with three different support analysts, and each has been highly responsive, knowledgeable and friendly. You can't go wrong with this app! — Paulaclaire on CLZ Books
October 22, 2020
Works like a charm
The ISBN feature works like a charm! — Kofi Adu-Boahen on CLZ Books
September 29, 2020
Highly recommended
This is the fourth CLZ app I have used and they're all of equally high quality. Easy to use and constantly updated so they keep getting even better. Adding a book is simple - just type in the ISBN or title (or scan the ISBN bar code) and unless it's a really obscure book the details pop up from the huge database. Even if your collection is in the thousands this app will store them with ease and display them in any order you choose. — Bravie2001 on CLZ Books
August 20, 2020
Books in Collection
I Like the fact That I’m able to scan my Books To see How many I Have in my Collection. That way I Know What Books I Have. — Kara Phillips on CLZ Books
July 05, 2020
Superb!
So far I'm able to scan my books and list them. This app is what I need. Extensive library! I'm just getting started. — A Google user on CLZ Books
March 16, 2020
Great app with related eco-system!
Using this app, the web based Book Connect as well as the companion CLZ Barry (ISBN barcode scanning) I have documented over a 1400 books for my father’s estate. It worked fantastically well! With the collectorz software we were able to keep the books we wanted and sell the rest creating the needed lists and views of the books. Can highly recommend this app and the rest of the collectors software! For entering a bulk number of books with ISBN the CLZ Berry + web based Book Connect works best, but to quickly get an overview and find a book this app is great! — MartinViking on CLZ Books
January 26, 2020
100 books in under an hour
I downloaded this app yesterday to help me scan the ISBN numbers for a ton of books I'm selling on Amazon. I managed to scan around 100 books in under an hour, upload the data to the cloud and then download the book data in CSV format which made adding products to Amazon much faster. This app is so easy to use and well designed. I'm using the free 7 day trial but I'll definitely be buying the 12 month subscription. — Tarik Davis on CLZ Books
January 21, 2020
Thank you CLZ!
I am amending my review to reflect the wonderful customer service I have received, as well as the functionality of the app. Of all the apps I tried to catalog my antique book collection, CLZ Books is my favorite. I like all the various data you can input, including reading date and price. My collection is from well before ISBN numbers (being published prior to 1900), so ease of manually inputting all of the data I want is important to me. I did try out scanning on one current book and it worked very well, but I haven't explored that side extensively. Edited to add, I just added a sci-fi/fantasy collection and used the ISBN scanner and was wowed by the plot summaries that came up! It's so fun! — RockyMtnSky on CLZ Books
November 17, 2019
Perfect voor de bibliofiel
Eenvoudig scannen, uitgebreide ISBN databank, overzichtelijke ordening, goede zoekfunctie. — xbydljgyhg on CLZ Books
October 18, 2019
Book Collector and CLZ
We subscribed to Book Collector over 15 years ago and had very good support from the company. We have since switched over to CLZ because our desktop computers have aged with us. We have had very prompt and succinct responses from their President, Alwin Hoogerdijk regarding our questions and concerns. We are very excited about the new App, since we can now use our iPad camera to scan each ISBN number that then gives you all the information you need and a beautiful cover picture for each book. We will finally be able to complete our collection without duplication of titles, and locate each volume quickly for reference, all in the palm of our hands.Thanks Alwin! — Wycinanki on CLZ Books
October 11, 2019
DE oplossing om mijn boekenverzameling overzichtelijk te houden
Al heel lang verzamel ik pop-up boeken..Eerst wist ik nog wel welke ik al had en welke niet, maar toen ik dubbele ging kopen maakte ik in Excel een bestandje en printte dat uit en nam dat elke keer mee....aangevuld met handgeschreven informatie. Maar toen ontdekte ik Collectorz.com, echt geweldig!!!!!!
Alle boeken staan er (bijna) en nu kan ik zelfs met mijn telefoon in de winkel zien of ik een boek al heb door het isbn te scannen. Ontzettend blij ben ik er mee , het is heel gebruiksvriendelijk en jullie support is ook snel en adequaat, als het nodig is. — Anneke Eggink (Netherlands) on Book Collector
September 12, 2019
Great app, easy to use, wonderful support
I’m using this app to catalogue my collection of over 1,000 cookbooks. Scanning the ISBN numbers with my iPhone has made this task much less daunting. I can also customize my results to my way of liking. Support is immediate and knowledgeable. Highly recommend this app! — Nrupup on CLZ Books
September 09, 2019
Nothing’s perfect, but some things are close
I tried three other apps before I settled on this one for cataloguing my fairly extensive book collection (around 3k volumes). The deciding factors were: ease of use, particularly in finding relevant catalogue records from ISBN with or without barcode; use on both iPhone and iPad (synchronised, obviously); some potential for additional bespoke data items I might want to add; and good customer service from the developers. This is the app that ticked all those boxes.

The interface is good, easy to use, and I’ve added a lot of records very quickly, at the shelf with my iPhone. They often need editing (different editions, covers etc), but this is done easily and effectively. Synchronisation is excellent, and indeed you can access your database through the web interface, and there are Windows/Mac versions (at a price). I haven’t fully explored the additional data fields available, but they seem good. And as well as seeing a number of reviews which mention the excellent customer service, I’ve experienced it myself, with very full engagement from the developer with the issues I’ve raised - none of which have been major.

Nothing is perfect, and there are things that could be improved. You can’t do multiple item edits on the iOS version (you can on the desktop versions), eg to overwrite all “genre” entries across a number of records. There are some slightly awkward user interface issues in inputting records (issues the developer has agreed to consider). But I have confidence that the app will improve - it’s regularly updated - and it’s building on a very solid basis. So overall - I’m very happy. And I don’t say that about many software products! — Ben0779 on CLZ Books
August 17, 2019
Muy buena aplicacion
Muy buena aplicacion y muy completa. Puedes agregar todos los datos necesarios: Isbn, codificacion Dewey, clasificacion por generos, etc. — Felipe Diaz on CLZ Books
July 23, 2019
Works great
Brilliant app for categorizing your book collection. Recognizes most books via ISBN barcode, even non-english books. Author and title search often find similar books if your barcode is not the same. Full manual entry also works.
Support answers quickly and politely even to questions that can be found in the manual. — Jorn Haugland on CLZ Books

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