AI Caption Generator · 1 tools
Compare AI caption generators for Instagram and TikTok captions, hashtags, video subtitles, alt text, and posts written in your brand voice.
An AI caption generator writes the text that goes with a post or video — social captions, hashtags, and on-screen subtitles — from a photo, a video, or a short prompt. Some read the image or transcribe the audio to describe what's actually there, while others spin caption ideas around a topic and tone you choose. The output ranges from Instagram and TikTok captions to SRT subtitle files and image alt text.
Batch-write on-brand captions and hashtags for daily posts across multiple accounts.
Add burned-in or SRT subtitles to Reels, TikToks, and Shorts for silent viewing.
Turn product photos into promotional captions without hiring a copywriter.
Generate alt text and translated subtitles to reach viewers in more languages.
Text-based caption tools send your topic, tone, and platform to a language model that drafts several caption and hashtag options to pick from. Image and video tools first run vision or speech-to-text models — a vision model describes the frame, or Whisper-style transcription turns audio into time-stamped lines. Those results are then cleaned into a caption, an alt-text sentence, or a subtitle file you can export.
