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Question

JPEG to JFIF automatically! HELP!

by missdawn215 / November 7, 2016 11:26 AM PST

Been working on my website and blog and this issue is wearing me out! Any JPEG image I download is automatically converted to a JFIF file when saved. It was random at first, but now it is doing it regularly and my uploaders for my sites won't recognize JFIF files. I keep having to go to converters online, which don't always work. It's needless and time consuming and is pissing me off! I am not very tech savvy, but I get by. I even tried to open them in paint and rename/save them. NO LUCK! Still a JFIF file. Is this a Windows 10 thing? A Chrome thing? I just want it to stop.

Any suggestions on what this is, why it's doing this and how to fix it??

Thanks in advance and please excuse my rant!!

Kindly, Melissa

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Clarification Request
Just last week.
by R. Proffitt Forum moderator / November 7, 2016 11:57 AM PST

I had a very confused client that took time to grasp that a file extension does not need to match the file association. I don't know how long you've used Windows or if you are looking at the file extension or the misleading Explorer file type.

Tell more.

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Re: jpeg and jfif
by Kees_B Forum moderator / November 7, 2016 12:35 PM PST
In reply to: Just last week.
http://www.fileformat.info/format/jpeg/egff.htm tells about jfif (jpeg file interchange format). Any hex editor (I'm using hxd) lets you look inside the file to see if it's jfif indeed. Also have a look at the original file to see if they are different or the same. If they are the same, just rename.

It's not really clear from your post what you or 'uploaders' up- or download from what to what using what programs, and what platform your website and blog are running on/written in.
But I've never seen a binary ftp to a site changing a file extension, nor in fact, a download from a site to my browser.
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Still confused...
by missdawn215 / November 7, 2016 2:11 PM PST

Thanks for responding! I'm using Ipage for my website and this also includes WordPress for my blog. All I am doing is finding images to use and saving image as (im making sure they are JPEG/JPGs) and then when it is downloaded, the little download box will name it and put it as a JFIF. I have tried changing it/resaving it in paint as a JPEG but it wont do it. When I go to upload the image, I am told that there was an error, that this format is not recognized. Apparently it is a more recent problem because I am seeing people posting the same issue throughout various forums and online with little to no answers. Sorry I am not really technical to explain it!

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What I didn't share (priors.)
by R. Proffitt Forum moderator / November 7, 2016 2:23 PM PST
In reply to: Still confused...
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Answer
JPEGs downloaded stored as JFIF
by ptharago / June 26, 2017 11:12 AM PDT

I discovered this happened as a result of the windows creator update. Every jpeg file identified by the browser as a jpeg when it is downloaded from the web is saved by windows 10 creator as a JFIF file which nearly nothing recognises. However I started a command window navigated to the offending files and using the ren command renamed the files to end with jpg and they now work correctly and will be opened by everything as normal. I t would be very easy to write a little batch file to do this for multiple files if the probel is a big issue. But who knows what Microsoft were dreaming about. I have tried 3 different browsers and behaviour is in all 3.

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Win10 Solution
by Vic121 / August 21, 2017 5:57 PM PDT

Open regedit

Navigate to:

HKEY_CLASSES_ROOT

MIME

DATABASE

Content type

image/jpeg

change "extension" value to .jpg

Close regedit, done.

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Thanks!
by jont73 / October 5, 2017 2:29 PM PDT
In reply to: Win10 Solution

I had the same problem, and it was driving me crazy. You really saved my day. Thank you!

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Re: JFIF
by Kees_B Forum moderator / October 6, 2017 3:13 AM PDT
In reply to: Win10 Solution

I checked my registry, and it already contained .jpg.
I wonder why it's sometimes changed.

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Thank you
by NeitherSparky / November 27, 2017 4:33 PM PST
In reply to: Win10 Solution

Thanks, this helped me too Happy

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