If you upload a PNG file to 4chan, it will create a shittier version by transforming it to JPG, and will show that one while browsing on mobile. The mobile file will have a "m" at the end of the name.

如果你上传PNG到4chan，它会转成JPG，生成一个画质更烂的版本，在手机浏览时显示那个。手机版文件名末尾会带个“m”。

I've only found instances of this on /pol/ (onb4 go back) so far, and only on files of size > 1.4 MB.

⋯ 继续阅读请开通会员 ⋯