Why can't I upload a JPEG image?

Question

Upon trying to insert an image as part of a post, from a web source, an error occurs saying:

format not supported

The image in question was a JPEG.

Are JPEGs no longer supported as an image format?

@PaŭloEbermann - zoetrope.speakermouth.com/assets/2008/4/9/textmate_lisp2.jpg — Rook, Nov 15 '11 at 21:11
@ldigas This isn't a bug: it's an issue with the image host. Your question was revised to reflect that: please do not roll it back again. — user8, Nov 15 '11 at 21:23
@MarkTrapp - What part of my question, now revised, differs from what I said in my original revision? — Rook, Nov 15 '11 at 21:48
@ldigas This is a support issue, not a bug: marking things bugs when they aren't adds noise for SE developers. Additionally, .jpg isn't a file format, it's an extension. — user8, Nov 15 '11 at 21:51
@MarkTrapp - From my side, as a user, it's a bug. Also, I didn't say anywhere .jpg is a file format (my words were ".jpg ... image format" which is correct, if somewhat unprecise). — Rook, Nov 15 '11 at 21:55
@ldigas I appreciate the fact that it looks like a bug to you; one of the perks of Stack Exchange is that it's collaboratively edited to ensure sure questions and answers are as accurate as possible: your question was edited to reflect that it's not actually a bug, despite its appearance. — user8, Nov 15 '11 at 21:59
@MarkTrapp - Oh, I don't mind that part of the edit. Edit all you want, it's your site & definition. — Rook, Nov 15 '11 at 22:04

Community · Accepted Answer · 2017-03-20 10:29:39Z

While this error was indicative of a problem on Imgur's end a few weeks ago, I can't reproduce this now. This is a JPEG upload:

This is a JPEG

Things to check:

You might be uploading a file that has the JPEG file extension but not the image/jpeg mimetype. Have you tried checking to make sure the file is actually a JPEG and not something else? If you're on a *nix-based system, you can check by using file.
You're using the "From the web" option with a URL from a site that doesn't allow Imgur to rip its images. Try downloading the image yourself and uploading it manually.
You're experiencing a localized disruption of Imgur. Try uploading the image again to see if it works.

While the "From the web" option didn't work, downloading it first and manually uploading it worked:

Image problem

Looks like it's a problem with the image host.

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