AI Caption Generator

An AI caption generator writes short text to go under a photo, video or post on social media. You describe what the post is about, choose the platform and a mood, and a language model returns five numbered captions. Each one is written to suit that platform, uses emojis sparingly, carries two or three relevant hashtags and ends with a call to action.

This one covers five platforms from a single form: Instagram, Facebook, TikTok, X (Twitter) and LinkedIn. The eight moods are Fun and playful, Inspirational, Professional, Witty, Romantic, Motivational, Educational and Promotional. That makes it the general tool for when you post the same thing in several places. If you only post on Instagram and want longer captions with a hook before the "more" cut and a hashtag block you size yourself, the Instagram caption generator is built for that one job.

The model runs on the Toolz server. Your description is sent over HTTPS, the server builds the prompt and runs Gemma 3 1B, a small open model from Google, with Ollama, and the captions stream back as they are written. Nothing is downloaded, so it works in any modern browser, phones included. What you type is used to write the reply and then discarded: it is not stored or logged, not used to train any model, and not sent to any third-party AI company.

Be realistic about what a 1B model can do. It writes from your description only, so it cannot see your photo and it knows nothing about what is popular this week. The hashtags it adds are guesses from the words you gave, not live data. It can also invent a detail you did not mention, so read each caption before you post it.

It is free with no signup. The alternatives are writing captions yourself, keeping a swipe file of ones that worked, or pasting your idea into a general AI chatbot. This tool sits in between: five drafts in seconds, with nothing kept afterwards. The limit is about 20 runs per 10 minutes.