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Just change the extension to PNG
Do people really think this changes the file type?
No I don't think it does but it works. Specifically I download webp pictures on pc and when I try to send them on WhatsApp it does not recognise them so I change the extension to JPG or PNG and it works it sends them and they can be viewed.
Sounds like the file type verification on WhatsApp is not on mime-type but only on extension. Some receivers might have trouble opening these though.
Well so far I did not encounter any issues so as long as it works I'll still do it like this
They might use standard imagemagick or such on the backend meaning they can ingest pretty much any image format ever invented, and have a limited set of extensions allowed on the frontend side so people don't upload
.txts.In my experience, WhatsApp does not send an image unchanged. So it doesn't matter if the recipient can handle it, as long as WhatsApp's conversion can