“Barcode Test helped us to mark our unique devices with compliant Code 128 and Data Matrix codes.”

–a Premier Medical Device Contract Manufacturer

“Barcode-Test is my go-to site for information on the subject.  It has provided me with great in-depth explanations of the details that go into a barcode, as well as in-depth explanations of interpreting the reports from my verifier.  Even if there is a specific topic or issue I am having, not covered by the site, I can reach out to experts there for more information.  I just wish I found this site long before I wasted a lot of project time troubleshooting with my supplier!”

–Medical Supply and Equipment Company

“In this day and age it’s difficult to find the level of service and integrity found when dealing  with Barcode Test. John we truly appreciate the expertise and enlightenment you have brought to rectifying our barcode issues.  I would highly recommend your services.”

–Global Lighting Manufacturer

“Barcode Test really helped me out…”

We had a mysterious problem with a barcode that just wouldn’t scan.

No time to send actual labels so we emailed a PDF and they figured it out. Worth every penny—we’ll use these guys again.

–New England based medical device company

“Perfect. Thanks for the quick turnaround and your expertise. We look forward to partnering with Barcode-Test for a long time.”

–Irvine, California medical device manufacturer

” Barcode-Test provided excellent customer service going above and beyond to give us quick results and help trouble-shoot our Data Matrix barcode.

The pricing is incredible and makes it possible for a small company to test 2D barcodes. We will be using Barcode-Test in the future for all of our testing needs.”

–medical device manufacturer

“We were looking to receive additional technical training in barcode knowledge and technology that we could apply in both our customer service and production departments. Barcode-Test and John Nachtrieb exceeded our expectations with the assistance and training they’ve provided. John was able to help us work through challenging jobs and provide us with a better understanding of multiple styles of barcodes, along with how to properly scan and read a report. We are pleased to say Barcode-Test is a great resource for everything barcodes!”

-a major Midwest label printer

“We were having a situation with our barcodes at our customer. Not having dealt with this issue prior, we needed an expert to assist with the situation. John Nactrieb of Barcode-Test came to our facility to grade our barcodes, but also assisted in troubleshooting and offered solutions to solve the issue. We are not Barcode experts, but John’s knowledge and assistance was invaluable. “

-Automotive Parts Supplier

Your EBook addresses a significant need in the verification market. It explains in detail the pitfalls as well as do’s and don’ts of barcode quality verification. This is why we at Axicon are proud to cooperate in the publication of this excellent work. We always thrive to Get It Right. Well done, John.”

Paul Bergé – Axicon

“It is challenging to create a document (New e-book) for the non-technical person and keep his interest in a very detailed topic. Simplicity and readability are often in conflict with accuracy and rigor. I offer my compliments to John Nachtrieb on the extent to which this booklet achieves these tradeoffs. I admire his effort.” 

Dr. David Allais

“I have worked with John on several projects. We found John to be very knowledgeable and a person we could count on when needed. When the need arises we will not hesitate to use him and his company in the future.”

Optimum Card Solutions

“The UPC verifier we got from you did all you said it would do and technical support was timely and effective.”

–a major Atlanta packaging company

“For years we have relied upon John’s detailed knowledge of barcodes…all shapes, sizes and formats…to help us design our verification process for our fifty plus VersamarkTM inkjet heads that produce millions of variable barcodes a year. He has an innate understanding of barcodes, their uses, even to potential problems that is a valuable resource from selecting and providing vrification hardware to educational seminars for internal staff.”

Segerdahl Group

“John provided us extrememly value added informatiuon tailored to our specific needs. No other courses or resources could have provided us the targeted knowledged we gained. Enlisting John’s services quickly enabled us to operate more efficiently and better serve our customers in the global marketplace.”

ConvaTec USA

“If you are in need of equipment to verify your bar code or QR code or you need information on any code, John Nachtrieb is the source you can rely on. When you are producing labels that are used in major retail outlets across the country you cannot afford to print a bad code. John’s knowledge and the addition of the new Axicon 6525-S keeps us on target.”

Master Impressions, Inc.

“I cannot speak highly enough of working with John at barcode-test.com.  He was very responsive and really helpful in helping me identify in what areas are barcoding needed to improve.  Our test results were sent back to us within one day of sending over the product to be tested and he gave very useful insight into all of our results.  I plan on using John for all of our future testing needs.”


“When we were looking for a new solution to verify thequality of barcodes we print on coupons, John was very helpful in helping usfind the perfect solution to fit our needs.”

Nestlé Purina Print Services

“The verifier I got from you did all you said it would and technical support was timely and effective.”

A major packaging company in Atlanta, GA

“Barcode-Test provided us extremely value added informationtailored to our specific needs.  No other courses or resources could have providedus the targeted knowledge that we gained.  Enlisting Barcode-Test’s services quickly enabled usto operate more efficiently and better serve our customers in the globalmarketplace. “