Barcode scanning is a vital tool that simplifies everyday tasks, whether you’re shopping, managing inventory, or tracking shipments. But let's be honest: it can be a bit frustrating if you’re not sure how to scan a barcode properly. That's the reason we're here to explain it for you—bit by bit—so you'll do it correctly each time.
Whether you're using your smartphone, a dedicated scanner, or even online tools, we’ll show you how to scan barcodes quickly and easily. Forget the hassle of misread codes or long wait times. We’ve got all the tips and tricks you need to make barcode scanning seamless and efficient. Ready to streamline your scanning process? Let’s dive in.
How to Scan Barcodes with Mobile Devices
Scanning barcodes with your smartphone is easy and can save you a lot of time. Whether you're managing inventory or shopping, here’s how to do it efficiently:
Scanning Barcodes on Your Phone: A Step-by-Step Guide

Scanning barcodes on your smartphone is quick and easy. Whether you're utilizing an iPhone or an Android gadget, here's the method to accomplish it:
- Open the camera app on your phone (most modern phones support barcode scanning natively through the camera).
- Point your camera at the barcode and make sure it’s well-lit and clear.
- Hold steady until your phone detects the barcode. You may see a notification or a pop-up with information about the product.
- Tap the notification to access the barcode details, or the phone will automatically process it for the intended use, like checking prices or opening a website.
Using your phone to scan barcodes is not only convenient but saves you the hassle of searching for product details manually.
How to Scan QR Codes Using Your Phone

QR codes are ubiquitous, appearing on everything from business cards to ads. Here's how to scan them on your smartphone:
- Launch your camera app on your iPhone or Android device.
- Point it at the QR code; no need to press any buttons, just focus on the code.
- Wait for a notification to appear on your phone, either automatically or with a simple tap. This notification could take you to a website, show product information, or even unlock a special offer.
In some cases, you may need to download a specific app if your camera doesn't automatically recognize the QR code.
Scanning Barcodes from a Picture or Gallery

Did you know you can scan barcodes from images already stored on your phone? Here’s how:
- Launch a barcode scanner application (numerous complimentary apps offer this functionality).
- Upload the image from your photo gallery containing the barcode or QR code.
- Allow the app to process the image. It will identify the barcode and scan it as if you were doing it live.
This feature is especially useful when you’ve already taken a photo of a barcode or QR code, and it saves time by eliminating the need to rescan.
While scanning barcodes with your smartphone is convenient, if your business requires more robust, continuous scanning, Tera's Android-based mobile computers like the P150 and P160 offer high-end performance. These devices feature a long-lasting battery, high-quality barcode scanning capabilities, and rugged durability, ideal for demanding environments like warehouses and retail."
Using Barcode Scanners and Online Tools
Let’s explore different methods for scanning barcodes, including using dedicated scanners, online tools, and even your laptop’s webcam for greater flexibility.
How to Scan a Barcode with a Scanner

To scan a barcode with a scanner, follow these essential steps:
- Make sure that the scanner, data cable, and terminal device (data receiving host and power supply) are properly connected before starting up.
- Hold down the trigger on the handle until the light is activated and the lighting area and aimer (focus line or point) appear.
- Maintain an angle between the scanner and the bar code other than 90 degrees.
- Adjust the scanning device back and forth to find the optimal reading distance, at which the barcode will be successfully picked up.
- When the scanner beeps and the light is off, the code is read successfully. The scanner will send the decoded data back to the host.
- Repeat the processes from 1 to 5 to scan your next barcode.
Note: Different types of scanners are featured with different functionalities, therefore choosing the right barcode scanner according to the barcode you want to scan is a prerequisite for you to be able to scan barcodes successfully.
- CCD scanners can read 1D bar codes on cellphone/computer screens, but cannot read 2D bar codes. The light is relatively wider, and the distance for a valid read can reach between 5-50cm. This type of scanner does not read well when the product is moving, but it is good at reading colorful bar codes and less than perfect bar codes.
- Laser scanners can read 1D bar codes, but cannot read 2D bar codes. The laser scanner cannot read both 1D and 2D barcodes from digital screens. The distance for valid reading can reach between 3-40cm. Laser scanners can also read moving products efficiently. However, it does not read colorful bar codes and fuzzy bar codes well.
- 2D code scanners are capable of reading both 2D and 1D bar codes, however 2D scanners do not perform as well as 1D scanners when scanning long , dense linear barcodes.
Online Barcode Scanners
No physical scanner? You can still scan barcodes using online tools with just your device.
- Upload Your Barcode Image: Go to an online barcode scanner and upload an image of the barcode you want to scan. These tools allow you to scan directly from digital images, including those in your phone’s gallery.
- Scan and Decode: The tool will read the barcode from the image and decode it, providing you with the product information or linking it to a relevant database.
- Review Data: The decoded data, such as product details or links, will be displayed on the screen.
Tip: While online barcode scanners work well for individual or low-volume scans, they may not offer the speed or efficiency of dedicated barcode scanners for frequent scanning tasks.
Scanning Barcodes from Your Laptop
If you’re working from your laptop and don’t have a scanner handy, you can still scan barcodes using your webcam.
- Enable Webcam Scanning: Download and install barcode scanning software that supports webcam scanning. Many software applications allow you to use your laptop’s webcam as a barcode scanner.
- Position the Barcode: Align the barcode in front of the webcam. The software will automatically detect and decode the barcode.
- Review and Save Information: After scanning, the decoded data will appear on the software screen. You can save or use the data as needed.
Tip: Webcam scanning is best for occasional use. For regular or bulk scanning, investing in a dedicated barcode scanner is more efficient.
For businesses that require high-volume scanning, Tera's 8100DPM Pro wireless barcode scanner provides an efficient and reliable solution. It offers various connectivity choices, such as Bluetooth, USB, and 2.4G wireless, enabling smooth connection with smartphones, tablets, and computers. Whether you are scanning barcodes from product labels or digital screens, Tera’s scanners ensure fast and accurate reads.
Choosing the Right Barcode Scanning App
When choosing a barcode scanning app, it’s important to pick one that fits your needs. Given the abundance of choices, selecting the most suitable option can be daunting. Here's a straightforward guide to assist you in choosing the appropriate barcode-scanning app:

Assess Your Device
Initially, determine if you're utilizing an Android or iOS device. Not all apps are compatible across both platforms, so be sure to choose one that suits your phone or tablet.
App Features
Look for apps with the following essential features:
- Speed and Accuracy: You need an app that can scan barcodes quickly and accurately to save time and reduce errors.
- Multiple Barcode Formats: Ensure the app supports multiple types of barcodes, including QR codes and 1D barcodes, for a broader range of use.
- Integration with Other Tools: If you need the scanned data to sync with your inventory management or point of sale (POS) systems, make sure the app offers integration options.
Ease of Use
Choose an app that’s simple and intuitive to use. You wouldn't want to spend time trying to understand how to operate the app or teaching your employees how to use it. The best apps should be straightforward and require minimal setup.
Additional Features
Some apps offer extra features such as the ability to create custom barcodes, store scanning history, or even manage inventory. Think about incorporating these extra functionalities if they meet your business requirements.
Reviews and Ratings
Before downloading an app, check user reviews and ratings. This can give you an idea of how well the app performs in real-world scenarios and whether it’s worth the download.
How to Scan a Barcode without an App
If you don’t want to download an app or need a quick solution, there are other ways to scan a barcode directly using your phone. Here are a few options:

Using Built-in Camera Functions (iPhone & Android)
On both iPhones and many Android devices, the default camera app scans QR codes, but product barcodes still require a third-party or retailer app. Simply open the camera, point it at the barcode, and the device will automatically recognize and display the scanned information.
Using Browser Extensions
Some browsers, especially on Android, allow users to scan barcodes directly from a webpage using extensions or built-in features. This method is handy when scanning barcodes on online platforms or when you don’t want to install additional apps.
Scanning Barcodes from Images
Both iPhones and Android devices allow you to scan barcodes from images in your gallery. You can open the image with a built-in feature or use a browser tool to extract the barcode’s information.
Common Scanning Issues and Troubleshooting
Scanning barcodes and QR codes is usually straightforward, but sometimes things don't go as planned. Let's go over a few typical issues and their solutions, so you can resume your tasks with minimal inconvenience.
Fixing Barcode Scanning Problems

If you're having trouble scanning barcodes, you're not alone. Here are a few prevalent issues and their respective resolutions:
- Damaged Barcodes: Barcodes that are scratched, torn, or faded can be hard to read. Try cleaning the barcode with a soft cloth, ensuring no dust or dirt is blocking the scanner. In case it's excessively damaged, you might have to reprint the barcode.
- Unreadable Barcodes: Sometimes, even a perfect barcode can be unreadable due to poor lighting or incorrect scanning angle. Make sure the scanner is positioned properly. Hold the scanner at an angle, not perpendicular, and ensure that the barcode is within the scanning range. If your scanner supports it, adjusting the focus or sensitivity can also help.
- Scanner Compatibility Issues: Some barcode scanners cannot read certain barcode formats. For example, a 1D scanner won't read 2D barcodes like QR codes. If you're using an incompatible scanner, consider upgrading to one that can handle the barcode format you need.
How to Overcome QR Code Scanning Problems

QR codes come with their own set of challenges. Here’s how you can troubleshoot them:
- Scanning from Photos: If you need to scan a QR code from a photo, it’s important to ensure the photo is clear and the QR code is centered. Most modern smartphones can scan QR codes from pictures, but not all apps support this. Verify the availability of this feature in your phone’s default camera app or a downloaded third-party app.
- Poor Lighting: Just like barcodes, QR codes may be difficult to scan if the lighting isn’t ideal. Attempt scanning in a brightly lit space, making certain the QR code is entirely visible. If you're scanning on a mobile device, tap the screen to focus the camera, improving the scan accuracy.
- Phone Settings: Sometimes, your phone’s QR scanning feature might be turned off. Check your phone’s camera settings or QR code scanning app to ensure the functionality is enabled. On certain devices, you can just launch your camera app and aim it at the code for direct scanning.
- Slow Scans or Failed Reads: If the QR code isn’t scanning as quickly as expected or not scanning at all, ensure there’s no obstruction on the screen and that the code is not too small. Also, try zooming in to ensure the QR code fills a good portion of your screen for better recognition.
Some barcode scanning issues, like damaged barcodes, can be challenging. However, Tera’s 8100DPM barcode scanner is equipped with advanced technology that can read damaged, worn, or tiny barcodes. Its high-resolution scanning engine makes it perfect for industries like automotive, healthcare, and aerospace, where precision is essential.
Conclusion
Having reviewed this guide, you ought to now possess a firm grasp of scanning barcodes across diverse devices and techniques. Whether you're using a smartphone, barcode scanner, or online tools, you now know the steps and techniques to make barcode scanning easy and efficient. This knowledge is key to saving time, minimizing errors, and enhancing productivity in any industry.
At Tera, we specialize in providing high-quality barcode scanners and mobile computers that integrate seamlessly with your existing systems. Our devices are designed to offer flexibility, accuracy, and ease of use, ensuring that your scanning process is as efficient as possible. Whether you’re looking for wireless, USB, or Android-based solutions, Tera’s products help streamline your operations and ensure real-time data accuracy.
Prepared to elevate your business processes? Don't delay in adopting the top barcode solutions. Contact Tera today for personalized recommendations and the right tools to elevate your workflow!
6 comments
HI Alain
The D5100 does not recognize reverse color barcodes by default (white barcodes with a black background), and you need to turn on reverse color barcode recognition in order to scan them. You need to scan this setup code and then try to scan the QR code they want to scan: https://cdn.shopify.com/s/files/1/0144/3482/8374/files/20250424-142251.jpg?v=1745475792
Hi, Mary Carlisle
Because the 5100 is a 1D barcode scanner, it can’t scan 2D codes.
Best Regards
Tera Customer Service Team
I recently bought a TERA Model:5100 to use at work for scanning QR codes but it isn’t working for those. How can i fix this? I looked in the manual and there is no QR code on barcode to scan.
Hello,
Can the D5100 1D/2D scan 2D barcodes that are printed white on black? It doesn’t seem to work with the units we have on hand. Is there a way to make this work with the D5100, or do you offer another model that has this capability?
Thank you,
Alain
Dear Customer,
You don’t need to change any settings to scan QR codes with the D5100. However, if you have already made some changes to your scanner, please scan the “QR ON” code in the Symbologies section to ensure that you have not accidentally turned off the QR code recognition function.
If you have any further questions, please feel free to contact our customer service at info@tera-digital.com. Thank you for your comment.
Best Regards
Question: what are settings to read QR codes on Tera d5100