Can a jpg thumb file be converted back to a normal jpg file?

Can a jpg thumb file be converted back to a normal jpg file? I want to print some photos, but for some unknown reason my jpg files are now thumb files. Thumb files produce very poor quality prints.

Posted on Jan 18, 2021 11:52 PM

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Question marked as Top-ranking reply

Posted on Jan 19, 2021 12:17 AM

The thumbnails are small low resolution version of your image intended for the thunbnail view. You can't convert them back to full resolution images.


What we need to understand is why you now have thm files rather than the the proper versions. Please reply with details of your system, eg:

MacOS version

Where is your library stored

Do you use iCloud photos - and if so, have you set "optimise mac storage"

Did anything happen prior to this happening (eg system upgrade, or move of the library.

How big is your library.

Are you sure you don't have both versions of the photos - a jpg and thm somewhere in the all photos view?


Also please post a screenshot of what you are seeing.

1 reply
Question marked as Top-ranking reply

Jan 19, 2021 12:17 AM in response to di249

The thumbnails are small low resolution version of your image intended for the thunbnail view. You can't convert them back to full resolution images.


What we need to understand is why you now have thm files rather than the the proper versions. Please reply with details of your system, eg:

MacOS version

Where is your library stored

Do you use iCloud photos - and if so, have you set "optimise mac storage"

Did anything happen prior to this happening (eg system upgrade, or move of the library.

How big is your library.

Are you sure you don't have both versions of the photos - a jpg and thm somewhere in the all photos view?


Also please post a screenshot of what you are seeing.

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Can a jpg thumb file be converted back to a normal jpg file?

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