Are you wondering how fast is your SD card? If so, you’ve landed in the right place!

Fortunately, there are several free tools around the internet that you can use to test your SD card speed and capacity.

In this article, you’ll discover what are the five best free software for testing SD Card speed.


5 Best Free SD Card Speed Test Tools

The tools i present you today can be used to verify whether an SD card’s capacity is real and not “fake”. Usually there are two ways by which a buyer of SD cards can be cheated. One is by giving inaccurate information about card capacity. For example, advertising the card capacity as 256GB when it really only has 16GB capacity.

The other way is by giving false information about the SD card speed. Read this article to learn everything about SD Card Speed Class (speed class, UHS, and video speed class).

Here are the 5 best free SD Card speed testing tools:

Blackmagic Disk Speed ​​Test

Blackmagic Disk Speed ​​Test is one of the best tools if you own a Mac. It’s a useful free utility is designed to test the speed of SD and microSD cards. The only limitation of this tool is that it’s designed for people who work with large files, such as video clips. Blackmagic Disk Speed ​​Test writes large blocks of data to the storage device. It then reads that data block to verify the performance of the drive/SD card. However, this also means that the test takes a lot of time to complete.

sdcard blackmagic



H2testw is a super-reliable tool that’s able to test the true capacity and read/write speed of your SD/mircoSD card or drive. This software was originally developed by a German software engineer. That’s why its website and the software is in German language. However, once downloaded, you simply need to run the installer. It will give you the option to use English as the default language. The only minor limitation to H2testw is the fact that it’s a bit old, which means that the software hasn’t been optimized for larger-capacity drives. As a result, it may take a bit longer to complete the test.




USBDeview is a portable utility by Nirsoft that allows you to find your USB device or SD/microSD Card and test its true speed. After you’ve found the SD card, you just need select it and press Start Test. It will sequentially read and write a 100MB file to get the true scores. You can then choose to publish the test results if you wish by clicking the button and ticking the box to agree to publish the results.

nirsoft usbdeview



SpeedOut is a simple tool to quickly measure the sequential read and write speed of your flash drive/SD Card. The program runs the tests at a low level. It means that the scores aren’t affected by the drive file system. To start the test, you need to first choose your USB drive from the drop-down (if you’ve more than one). SpeedOut will then run 4 passes for both reading and writing tests and display the average for each. The scores can be saved or copied by right clicking on the title bar. SpeedOut is a non-destructive tool, which means that no files are overwritten and the SD Card/Flash Drive doesn’t need formatting to run the test.




While all the tools above write data to the SD card in order to determine its speed and capacity, ChipGenius doesn’t write any data at all! Instead, this tool locates the manufacturer information as well as storage information programmed into the SD card storage. It then cross references this information with its database. After this process is done, it reports the findings back to you. For example, if you purchased a 64GB Class 10 SanDisk SD card, but ChipGenius reports that it’s actually an 8GB Class 6 Emtec, then you know that you’ve been cheated. The main advantage of this tool is that the test process is much quicker. However, many shady sellers today know how to cover their tracks. So, ChipGenius may not be able to identify every fake card floating around on the Web, just the poorly programmed ones.

sdcard chipgenius



In addition to the software mentioned above, there are several others that you can use to check the speed of your SD Card. These include: Disk Speed ​​/ Performance Test, CrystalDiskMark, SD Card Speed, Flash Memory Toolkit, A1 SD Bench and so on.

While these tests may come in handy after you’ve purchased an SD card, you should always beware of fake, bad quality and unbranded SD cards. So, be extra cautious while making the purchase. Always go for genuine, high-rated sellers and well-known brand products. 

Check out reliable SD Memory Cards here >

If you are looking to buy an SD card compatible with your GoPro camera, then check out this article >>


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