Instagram Caption AI
Generate captions from images.
creator
PlugThis prompt
Build a Chrome extension called "Instagram Caption AI." On instagram.com when the user is composing a post, inject a "Generate caption" button next to the caption field. The user uploads or pastes the photo (or the extension grabs the upload preview), sends it as a base64 image to GPT-4o vision with a prompt to write 3 caption variations (witty, descriptive, emoji-heavy) with a small set of relevant hashtags. Click a variation to insert. User-supplied OpenAI key. Permissions: storage, activeTab. Host permissions: https://www.instagram.com/*, https://api.openai.com/*. Manifest V3.
How to build it in 3 minutes
- Sign in to PlugThis and open the chat input.
- Copy the prompt above and paste it into the chat.
- PlugThis generates the full Manifest V3 extension in 60-90 seconds.
- Download the zip, extract it, and load it via
chrome://extensionsdeveloper mode.