Caption Check shows you exactly how your social media captions will look before you hit post.
Paste your caption, pick a platform, and instantly see a realistic preview — phone frame or desktop — for Instagram, TikTok, Facebook, X, LinkedIn, YouTube, Threads and Pinterest.
The main thing it solves: Instagram hides your caption behind "...more" after 125 characters. TikTok at 100. Facebook at 477. Most people write their caption, post it, then realise the hook was invisible the whole time.
Features:
- Live character counter with per-platform limits
- Exact cutoff point highlighted — see what's visible before "...more"
- Mobile and desktop preview frames
- Hashtag counter with platform-specific recommendations
- Image ratio selector per platform
- AI caption rewrite to strengthen your hook
- Dark mode
- No signup required — completely free
