Could not complete your request because an unknown or invalid JPEG marker type is found

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• Error: An Unknown Or Invalid JPEG Marker Type Is Found

By Sarah | Follow | Last Updated May 26, 2020

Many users shared the same experience on the internet: they can’t open a JPEG image in Photoshop and receive the error message “an unknown or invalid JPEG marker type is found”. This article will discuss the error and provide several practical solutions to solve it.

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JPEG images are very popular all over the world. The word JPEG refers to the lossy compression method for digital images, especially those produced by digital photography. You can adjust the degree of JPEG compression so as to keep good balance between storage size and image quality.

Invalid JPEG Marker Error in Photoshop

There are a lot of programs and applications that can be used to open a JPEG file; Photoshop is a frequently used one. However, the problem is many users said they run into an invalid JPEG marker error that prevents them from opening the file successfully.

You will see the following error message in a pop up window that suggests the error:

Could not complete your request because an unknown or invalid JPEG maker type is found.

What are the causes of invalid JPEG marker type and how to fix it yourself?

What Causes Unknown or Invalid JPEG Marker

There are 7 main reasons that could lead to invalid JPEG marker error.

• The device keeping that JPEG image has been attacked by virus, resulting in corrupted JPEG files.
• The header files are corrupted or broken somehow.
• Bad sector is found on the storage device saving JPEG, such as SD card.
• The JPEG file extension has been modified improperly.
• The JPEG file is corrupted due to incomplete scan.
• Click to view the JPEG file when not enough memory pops up on the device.
• Use the digital device for storing or transferring in low battery.

How to Fix JPEG Invalid Image Error

Please follow the steps mentioned below to try to settle down the unknown or invalid JPEG marker type issue.

Method 1: change the extension of JPEG image.

Stage one: show extensions.

1. Click on the Start button in the lower left corner.
2. Scroll down to find and open Windows System folder.
3. Choose Control Panel from it.
4. Click Appearance & Personalization link.
5. Select File Explorer Options.
6. Shift to the View tab.
7. Look for the Advanced settings section.
8. Uncheck Hide extensions for known file types.
9. Click on the OK button to apply changes.

Solved – Files Not Showing In External Hard Drive [2020 Updated].

Stage two: change extensions.

1. Navigate to the target JPEG file and right click on it.
2. Choose Rename from the menu.
3. Change the extension to .jpeg or .jpg.
4. Click on the blank space to save changes.

Method 2: convert JPEG to a different file format.

1. Open the JPEG image in the photo editing software you're using.
2. Choose File from the menu bar.
3. Select Save as from the drop-down list.
4. Choose a target file format (.png, .bmp, or other types) and click on the Save button.

Note: Please copy or back up the JPEG files in case of any accidents. Click here if you want to recover deleted photos from SD card or other devices.

Method 3: open JPEG file in web browser.

1. Open File Explorer.
2. Navigate to the JPEG file you want to view.
3. Open a web browser and drag the image directly to it and then drop.
4. If the browser can open the JPEG file successfully, you should save & open it in photo viewer application.

Method 4: run hardware troubleshooting.

1. Open Control Panel.
2. Choose to View by Small/Large icons.
3. Select Troubleshooting from the list.
4. Click Configure a device under Hardware and Sound.
5. Click on the Next button and follow the instructions to complete troubleshooting.

Another way you can try to fix the invalid JPEG maker error is checking for compatibility problem.

About The Author

Position: Columnist

Sarah has been working as an editor at MiniTool since she graduated from university. Sarah aims at helping users with their computer problems such as disk errors and data loss. She feels a sense of accomplishment to see that users get their issues fixed relying on her articles. Besides, she likes to make friends and listen to music after work.