Snapchat is a popular messaging app with a large following on Instagram. If you want to post your Snapchat on Instagram, there are a few things you need to know. First, open the Snapchat app and sign in. Next, go to your profile and select “Post on Instagram.” You’ll be prompted to choose a photo or video to post. Select your snap and hit “Post.” Now that your snap is posted, head over to Instagram and search for the “Snapchat” hashtag. You should see all of your posts from the past 24 hours! ..