I've built graphics on my iMac, totally using Apple software - no downloaded images. I save my work as jpeg images, but when I try to load it on Facebook, they reject it as an HEIC. This just started happening in the last few days.
[Re-Titled by Moderator]
iMac 24″, macOS 14.3
Maybe the file suffix is erroneously .jpg but the image is, in fact, .heic (i.e. HEIF codec)?
If you open such image in Preview.app, what does its Tools > Show Inspector report? In the screenshot below I deliberately changed .heic suffix to the wrong .jpg but it is still HEIF image.
A real .jpg is like this:
...Ventura and Sonoma Preview.app has a bug which in batch export, exports images with the wrong suffix like this.
Maybe the file suffix is erroneously .jpg but the image is, in fact, .heic (i.e. HEIF codec)?
If you open such image in Preview.app, what does its Tools > Show Inspector report? In the screenshot below I deliberately changed .heic suffix to the wrong .jpg but it is still HEIF image.
A real .jpg is like this:
...Ventura and Sonoma Preview.app has a bug which in batch export, exports images with the wrong suffix like this.
HEIF/HEIC is what your iPhone will shoot if you have the camera configured for high efficiency and not most compatible (JPEG).
I was using Image Capture to pull images from my iPhone 15 Pro Max and they were HEIC before I made that first paragraph change. Could this be a contributing factor for you? MacOS does not automatically generate HEIF/HEIC images unless told to do so using the Convert Image Quick Action (HEIF), or specifically exported from Preview in that format.
First, thanks to everyone who offered tips. I tried almost everything, and nothing worked. I reinstalled Sonoma this morning, and I'm back in business. Something, somewhere in the OS, got corrupted. When in doubt, rebuild. 😁 Thanks again for trying to help.
Have you tried another browser?
Try uploading a test image here using the "Image insertion" tool:
Files must be jpg or png and under about 5MB.
If it uploads here, I suspect your next step is to ask FB what up, especially considering your statement:
This just started happening in the last few days.
I don't think that's it. I'm definitely exporting from Preview as .jpeg - neither .jpeg nor .png will work. Furthermore, I tried running an image through Affinity Photo and exporting it as .jpeg and got the same error message on Facebook - the message is:
Your file can't be uploaded: tempImage0ZdsHF.heic
Maybe it's a Facebook problem, but I don't see anyone else having this problem.
Thanks. they are .jpg - As I understand it, they are the same. ""JPG" and "JPEG" are two equivalent file extensions that both refer to the exact same digital image format. JPEG is an abbreviation for "Joint Photographic Experts Group," which is a tech industry group that created the JPEG image format widely in use in digital cameras, social media, and on the web." The .jpg started because in the old days, Windows/DOS would only accept three character file names.
Reply
When I write tools that consider image extensions, I treat them as case-insensitive and test for .jpg, .jpeg, .jp2 (JPEG-2000), and .jxl (JPEG-XL) image formats. I make no assumptions when someone says they are using JPG, and you should not assume that the software you are using to upload to Facebook is made this accommodating.
Facebook may be checking image extensions or have set a maximum upload file size. Facebook should be expecting files with extensions named .jpg. Check with Facebook to verify.
Thanks for the input. I'd read about iPhone images, but my iPhone is not part of this. For instance, I might create an image in Keynote, then open that in Preview, do a little editing and then save it as .jpeg. I've been doing it this way for years without a problem. It's just been in the last few days that I'm getting this HEIC rejection thing from Facebook. It might be a setting on my iMac, but I can't find it.
That was a good idea, but it didn't work. I used Firefox, and FB still wouldn't post. There was a difference this time. The FB error showed the file as a .jpg, but it still said they couldn't post it. I have a hunch this is something wonky happening on FB.
writermd wrote:
Thanks. they are .jpg - As I understand it, they are the same. ""JPG" and "JPEG" are two equivalent file extensions that both refer to the exact same digital image format. JPEG is an abbreviation for "Joint Photographic Experts Group," which is a tech industry group that created the JPEG image format widely in use in digital cameras, social media, and on the web." The .jpg started because in the old days, Windows/DOS would only accept three character file names.
Yes, you are completely correct, but that doesn't mean a website uploader tool the got off GitHub isn't smart enough to know that.
I checked that. I think they said no over 15 MB. I just tried one that is 2.1 MB, and it shot it down.
Is the suffix .jpg or .jpeg?
I posted the wrong replay a minute ago.
Why am I not able to upload jpeg images to Facebook?
