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Instagram Caption Generator On-device AI

Paste your topic → get 3 Instagram caption variations in your chosen tone and length. Works for photos, Reels, carousels, and Stories. On-device AI — your topic never leaves your browser.

On-device AI not available. This tool needs Chrome (or Edge, Brave, Arc) with Gemini Nano enabled. First use triggers a one-time ~1.5GB model download.

Instagram captions are one of the highest-leverage things creators write. The first 125 characters appear before "more" in the feed — that's your hook window. Miss it and nobody expands. This tool gives you 3 variations so you can pick the one that actually fits your voice (rather than forcing the first output). On-device AI, nothing leaves your browser.

How long should an Instagram caption be?

It depends on the post. Short captions (under 125 chars) work for visual-driven posts where the image does the work. Longer captions (storytelling) drive saves and deeper engagement for personal brand or thought leadership accounts. Instagram caps captions at 2,200 characters.

Where do the hashtags go?

Either at the end of the caption or in the first comment — Instagram treats them identically. First comment keeps the caption cleaner. 3-5 highly relevant tags beats a 30-tag dump.

Does this run on my device?

Yes — Chrome's Gemini Nano runs locally in your browser. Your topic and captions never leave your device. Zero API cost, zero privacy tradeoff.

Can I regenerate if I don't like the variations?

Yes — click Generate again. The model produces fresh variations each time. The tool gives you 3 per click so you can pick the best angle.

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