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Book Cataloging Software - catalog your books by ISBN

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

For phones/tablets

Mobile app for iOS & Android

  • Fast and slick mobile app
  • Install on multiple phones/tablets
  • All data stored on your device
  • Sync data to CLZ Cloud (optional)
  • Built-in camera barcode scanner

For computers

Web-app for Windows and macOS

  • Easy to use online software
  • Login and use from any computer
  • All data stored in the CLZ Cloud
  • Automatic updates & backups
  • Free CLZ Barry barcode scanner app

For Windows only

Download for Windows

  • For advanced Windows users only!
  • Install on one Windows PC
  • Manage your own data & image files
  • Sync data to CLZ Cloud (optional)
  • Free CLZ Barry barcode scanner app

Buy them together and get a discount

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

Use the free CLZ Cloud service to:

  • Synchronize your book database between the desktop software, mobile apps and the Connect web-app.
  • View your list online and share it with friends and family.
  • Always have an online backup of your book database.

Latest software updates

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 September 21, 2021

Reviews from customers

June 24, 2021
Excellent choice
I would like to thank Alvin, Sytske and the team for all assistance given over the past 5 years; your book cataloguing software proved an excellent choice for recording some 7,500 books in an important legacy private collection. The ability to then share the catalogue with a wide variety of potential inheritors and auction houses has made the final distribution of the collection both straightforward and effective. I will certainly recommend Collectorz in future where appropriate. — Richard Campbell-Howes (United Kingdom) on Book Collector
June 24, 2021
Amazing App and Amazing Support
So, I’ve had this app for multiple years. Completely recommend to everyone and I haven’t found another app that provides the same level of support and app creation. There are so many options for collectors and for casual book-lovers to personalize your book catalogue.
So, recently I had a issue with the app. My accounts weren’t syncing to the cloud. So i sent in a email support request at 8:28 am and received a reply at 8:41! I didn’t have to sit for hours worrying. They guided me through what I needed to do and have access on their end to see what the problem is. My issue had been solved at 10:00 am on the same day!!
I cannot thank the customer support agent enough for the fast service and the great guiding!! 100% would recommend this app! — Girt374(,!29; on CLZ Books
June 24, 2021
Best App and Customer Service App Ever!!!!
I am most pleased to post a review for the CLZ Book App. I truly love this app. I searched for a cataloguing library app for years to catalog my book library. For years, I kept a paper copy of my books, but found this to be ineffective due to the fact that my collection over the past twenty-five years had grown by the thousands. But luckily, I kept searching and found the CLZ Book App. A couple of years ago, I read all of the reviews and convinced myself to purchase the app. Over the past couple of years, I have spent so much money on apps that promise, but do not deliver. But after purchasing this app, I can honestly say that my faith was restored. This is the BEST app for developing and maintaining a library.
It’s easy to input the information about books and the developers are constantly making changes to make this the best book cataloguing app ever. In the couple of years that I have used this app, I have found the developers are very responsive and responded quickly whenever I had an issue.
If you are looking for an app to develop your library, the CLZ Book App is the answer. I highly recommend this app and give it a 5. If I could, I would give it a 5+++++. — miss BCAEA on CLZ Books
June 23, 2021
Five star cataloging software!
I’ve been using CLZ software (mainly Book Collector, but also Music Collector and Movie Collector) for very many years in both the mobile form and as a desktop app. No other book cataloging software comes near this in terms of quality, ease of use and value for money. Although I’ve rarely needed to use customer service, I have found that they offer a fast and friendly response to any queries. As a collector I have over 6000 books and I would be lost without this software. — IainChallis 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 29, 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 on CLZ Books
March 12, 2021
The best
Best book cataloging app and computer program there is. — Nat W on CLZ Books
January 31, 2021
Great Book Cataloging App
CLZ Books is a very well thought out app for cataloging book collections, and has been getting better and more comprehensive in recent upgrades. The support team are great - queries are usually answered quickly and clearly. I've been using Collectorz software for a few years now, and have always been impressed by their helpfulness. If you have a book collection and you'd like to have a reference to it on your mobile device, CLZ Books is worth putting at the top of your list for consideration. — Sounztorm on CLZ Books
January 03, 2021
Great Book Cataloguing App
Great Book Cataloguing App I really like the CLZ Books app. Previously I had a free app that was a lot of work. What I really like about CLZ is that I don’t have to keep typing in the location of books on the same shelf. The next book I enter automatically is at the same location and I can change locations when I want. It seems like a small thing but actually saves quite a bit of time. Previously I had a free app that required typing in the location for each book. Another feature I like is the large amount of books available when I search by title so I don’t have to manually enter very many books. Finally, the colors on the list of my books is a nice touch. I am very happy I found your app which makes cataloguing books fun rather than work. — Kf2Kt on CLZ Books
November 30, 2020
Best book cataloguing software I’ve used!
Best book cataloguing software I’ve used!
I tried 3-4 other book cataloging apps before I found CLZ and it’s computer based sister Book Connect, but all those others had their limitations and seeming to be aimed at novels. I needed a serious app to catalogue my very late research and academic library and this was it. I now have over 3000 books catalogued and add every new book before putting it on my shelves. It does not take long to learn how to use this app and customer support is excellent with replies often coming back in minutes. I log all my books with Book Connect on my desktop and easily sync to CLZ on my mobile. Have you ever been in a nook shop and wondered if you had a particular title? You either buy it and get home to find it is a dupe or don’t buy it, get home and kick yourself because you didn’t have it. CLZ prevents this and if it stops you buying one dupe a year it has paid for itself. Shopping online for titles? Check if you have the title with Book Connect on your computer. I love it and have recommended it to loads of my friends. — cant see the light on CLZ Books
November 22, 2020
Cataloging app
Effective book cataloguing app. — Jason Whyte on CLZ Books
June 19, 2020
Great library experience
More than 15 people who are on our Library Committee and staff have looked at our 1500 book catalog in CLZ Cloud and are very pleased with it. To a person, they have said how user friendly they think it is. I am delighted since there were several people who questioned why we needed a catalog. You know how some older people are about change! I am an older person too but I am thrilled to offer your product as a great improvement to our library experience. Just think, we can check for books in our retirement community's library from the comfort of our own apartments and cottages! — Betty Iwan (USA) on Book Collector
April 23, 2020
The BEST book cataloging software
I have used many book cataloging softwares ( including Library Thing). Book Collectorz is the best because:
1. It never, ever, ever, ever hangs
2. Customer support is top class
3. Deeply customisable
4. Available and syncs across all platforms
5. Very fast
6. Includes the 'Book Lending' feature
7. Very low cost for such a feature rich and solid software. — Param96 on CLZ Books
August 26, 2019
A great app!
I had been looking for a book cataloging app and the ones I had seen were fine. I was hesitant to purchase this app when I came across it, thinking that maybe paying $20+ wouldn't be necessary just to have a list of books on my phone, but as I played around with the free version, it really was what I was looking for. I bought this one and the CLZ Movies and I never regretted it! It was 100% worth the money. — A Google user on CLZ Books
June 18, 2019
The best app
Best book cataloging app on the store. — Not Lou Ferrigno on CLZ Books
May 26, 2019
The best on the market
This is the best book cataloguing app on the market. I have all CLZ products on my PC, and I am more than satisfied. I would give it 7, 8 or 9 stars if I could. — Igor Edenbeast Tosic on CLZ Books
August 19, 2018
Great app
Great for my book project, cataloging books being donated to schools overseas. I can share the list easily. — Lisa querijero on CLZ Books
November 04, 2017
So professional
This is the first app for cataloging books that is so professional and easy to use I give it 5 stars. — Robin Shertzer on CLZ Books
September 06, 2017
I Can't Imagine Better
This app is a robust, easy to use, companion to the desktop version of this book cataloging database. The support is excellent. Moreover, the communications with the firm's leadership are friendly, evidencing that the entire team likes what they are doing. — Bernie of Ohio on CLZ Books
May 18, 2017
Simply the best
Best book cataloging software. Have purchased for all platforms. — Abhay Bakshi (India) on Book Collector
May 10, 2017
App is wonderful
It is a great way to catalogue books and to manage them. I like to fact you can have your entire library right on your cell phone. — w5nio on CLZ Books
March 06, 2017
Great app
Not the prettiest app, but the scan function is way superior to every other book cataloging apps I've tried. — Browniecheng007 on CLZ Books
July 20, 2016
A joy to use
I downloaded a dozen or so book cataloging apps to try them out. Mostly, they went from bad to worse. CLZ Books was superlative: user-friendly, smart, fast, and intuitive. Keep up the good work! — Sistah Eve on CLZ Books
May 17, 2016
Wonderful! Catalogue your books
This and its desktop counterparts go from strength to strength. They interact seamlessly via the cloud and hugely facilitate the making and keeping of a book catalogue. Since you can carry the catalogue in your pocket it will pay for itself in prevented duplicate purchases. There is room for improvement; I would happily pay a modest amount extra if Dewey numbers were routinely included in the online catalogue; at present the majority of my non-fiction books have them, but many don't. The subject indexing field is chaotic and anarchic. It seems that users can dream up their own format for each subject, with the result that one subject may have several labels differing only in punctuation or some other trivial respect. There must be a better way. The handling of diacritical marks is deficient. The book price fields give no indication of the currency: this makes the field essentially useless if one buys in several currencies. A way of printing labels including spine labels would be a useful addition. However the app is continually being improved over the years. Support is excellent, with prompt and intelligent responses. It's by far the best solution I know of for a private collection or small library. — Leighton008 on CLZ Books
February 22, 2016
Best I've found
While it's not perfect, this is the best application I've found for keeping a book catalog synchronized between several Mac computers, iPad and iPhone. I recommend it; if you need very detailed records, the Mac or Windows application is more complete and works perfectly in conjunction with this one. Barcode scanning for ISBN works well; note that some books (mainly from the 1980s & 90s) have a UPC code instead, which doesn't identify the book. — Anton Rang on CLZ Books
March 09, 2014
Awesome
We have spent many hours cataloging books in our book collector software. The software is awesome! Really, one of the best I have ever used and very affordable. It is so simple and intuitive. My seven-year old does a lot of cataloging and really enjoys it. She often says she wants to be a librarian. ;) Well done! — Erin Daly (USA) on Book Collector
July 11, 2013
A Great Program
This book app is worth every cent (especially if it can prevent you from buying duplicates!) and with the new update has become increasingly user friendly. The design is very laid back and easy to use. Definantly the best book cataloguing app out their. One feature I would like seeing however is database totals so I can view the worth of my collection. — LongHairedFreakyDude on CLZ Books
November 28, 2012
CLZ
I have the full version of Book Collector and Music Collector therefore have both CLZ's. The good thing about these programmes is they have NO missing artwork, and the support is amazing. Since buying these programmes I have stopped buying duplicates.
If you like to catalogue books, music, comics etc,etc then these programmes are for you. — Amdramsing on CLZ Books
August 21, 2011
Great tools
Spent most of the day working on building and filling bookcases with books for our "library" - enjoy using the software by Collectorz.com - great tools to catalog books and movies! — LauraLee Dooley (USA) on Book Collector
October 17, 2008
Oh happy day!
I have been searching for a broad and diversified book cataloguing program, at one time beginning to design my own, but think you have come up with everything I am needing to include.

An academic colleague referred me to you - oh happy day! — H Adams on Book Collector

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