Why Does The Site Take Into Consideration The Extension In The Name?

When I want to upload an image, the site takes the name of the image + the extension as the name.
Example:
I have a file to upload which name is onedollar.
It is a png type
The site considers that the name is onedollar.png and therefore it rejects it.
I cannot change the name of my files (they don't have extension in their name)
What to do?
Thank you

PNG and BMP files are not allowed. They are horribly inefficient for the internet.

More accurately, PNG and BMG are inefficient with respect to file size, which is a concern for uploadable storage capacity. You can still post PNG files here, but you have to use external storage, e.g., Imgur or your own hosting account rather than using the forum's uploadable storage.

For certain types of images, PNG is superior to JPG, for example a photograph that also needs to be transparent in certain areas.

However for posting stamp or cover images online, there's no reason you shouldn't be able to use JPG; there's no inherent advantage to PNG... and you can upload JPEGs here.

GIF can do the same thing much more efficiently than PNG.

Bobby- I'm curious. I frequently use PNG for images that need to be scalable. Is this a capability of GIF files?

priatel, there are free online image conversion sites. Search something like "free convert PNG to GIF" and you'll get to the exact page you need.

You might already know this, but with extension unknown, right click on the file name or icon, then click "properties" to tell you the type/extension type. If it's a really uncommon type, you'd get a message asking what to open the file with when you tried to open it. Sometimes file types online are purposely misidentified to prevent uploads.

Convert to jpg, please. It is the most efficient for here.

Yes it can, but the problem with GIF is color palette. The GIF format only supports 256 colors, whereas PNG has a (virtually) unlimited color palette similar to JPEG. Historically, GIFs are used for logos, clipart and other images where the number of discrete color shades is small, but you need transparency.

Basically, 24-bit PNG is a mix of the best aspects of both GIF and JPEG, but it comes at a price: larger file size.

All that said, from a space utlization standpoint, it makes sense to not support PNG here for uploaded images.

As far as converting to GIF instead of JPEG, I do not recommend it. The larger the number of colors and gradiants in an image, the more stark the difference in GIF vs. JPEG. On some images, converting to GIF won't show any visible difference, but on others you may see banding, muted colors, and other artifacts.

JPEG really is the best choice for stamp/cover images.

I am surprised that the site transfers format directly. Sites I've worked at and use/used accept/accepted common formats but converted them to JPEGs for display. JPEGs from now on it is, then.

revenuecollector, thanks for the explanation. I just yesterday got the weird effects mentioned when outputting something from my image program originally input as a GIF, something I have not done until joining up here. Again, JPEGs for this site from now on.

I have never seen a site that did that.

Neither have I. Automated image conversion can have nasty side effects.