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(Originally posted here, SE image host -- bitmap extension)

Funny, uploading a somewhat less traditional format (Windows Bitmap), direct from file (drag and drop), I obtained this:

enter image description here

Poking around, I find the actual image resides at https://i.sstatic.net/IYK4JzFW.png and it seems the link just wasn't renamed automatically.

Ed: actually, it seems to be worse than that: I see the download is the original 38k file size, and the header is content-type: image/bmp. The browser doesn't care, so loads it regardless. So it's not being converted to PNG (as I mostly? expected from the Imgur service?), but is renamed erroneously, ah.

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7
  • Imgur service ... it is since last week no longer imgur: Stack Exchange’s image hosting arrangement with Imgur is ending - advance notice
    – rene Mod
    Commented Apr 29 at 10:03
  • @rene Yes, hence past tense.
    – Tim Williams
    Commented Apr 29 at 10:43
  • Ah, fair. I wasn't sure when I parsed that.
    – rene Mod
    Commented Apr 29 at 10:45
  • 2
    The new uploader says: "Supported file types: jpeg, png, gif, or bmp".
    – PM 2Ring
    Commented Apr 29 at 18:51
  • I don't see why you'd want to convert it. bmp is a perfectly good format, supporting compressed 24-bit colour. The bug seems to be an accidental rename, which I'm guessing is a copy-paste issue somewhere.
    – wizzwizz4
    Commented Apr 29 at 21:06
  • 2
    I mean I don't mind if a host were to convert it to an objectively better format (PNG, I think, supports everything and more that common BMP formats used? plus the compression is better, and obligatory). But that's a storage and bandwidth optimization. As a user, it doesn't matter to me, all I want is a pixel-exact (or high quality lossy-compressed, if too many colors) image out the other side.
    – Tim Williams
    Commented Apr 29 at 21:42
  • 8
    This is not the expected behavior. A fix for bmp images is coming. In the meantime your workaround by changing to png works.
    – Troy Gould StaffMod
    Commented Apr 29 at 22:58

1 Answer 1

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This should be fixed now. Like Imgur, any bmp file is converted to a png during the upload process. You should no longer need to change the extension on the image after it's uploaded.

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  • 3
    Congrats for your first post in Stack Exchange! That's what I call starting with style. :D
    – Shadow Wizard
    Commented Apr 30 at 20:00
  • 4
    Thanks! I've been here for over a year, but not posted anything. I should merge my personal account with my work account since I've been a user for over 10 years.
    – Troy Gould StaffMod
    Commented Apr 30 at 20:07
  • Cheers, that would be nice indeed. While at it, any chance to take a look on the issue mentioned in this chat message, where chat bot that used to upload to SE can't upload now due to more strict size limit? Thanks!
    – Shadow Wizard
    Commented Apr 30 at 20:49
  • Hard to tell from that link. Are you referring to the height/width of an image, or the file size?
    – Troy Gould StaffMod
    Commented May 8 at 20:13
  • File size, but the bot owner already handled it by now, so guess all is good. Thanks!
    – Shadow Wizard
    Commented May 9 at 8:01

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