Instagram now allows uploading pictures from your computer without any aditional software needed.
For a PC to access the https://instagram.com website, they’ll need to use an internet browser for the easiest solution. This will be either Google Chrome, Firefox or Microsoft Edge. They can upload a picture from their computer by clicking on “Upload Photos” in the menu bar and then selecting which pictures they want to add to their blog post.
Uploading pictures from your PC to Instagram is not possible. You’ll need to connect your devices with the same Instagram account in order for photos to appear automatically on both devices.
-Download and install the desktop app from Instgram.com
-Log in to your computer’s Photos function/library and copy the pictures to your phone.
-On Instagram on iPhone/android, tap on a photo post you want to change, tap Edit at the top right, select Select Picture or Add From Your Phone (depending on if you’re uploading a new picture or want to replace one), select photos stored on phone – they should be in alphabetical order by title.
Tap Done at bottom right of screen and post as normal!