Write Captions with AI

One click writes an on-brand caption with hashtags, based on what your design actually says.

Written By Andrei Terteci

Last updated About 1 hour ago

In the post composer, click the AI button next to the caption field. Krumzi writes a caption plus three to five specific hashtags. It costs 1 credit.

What makes it different

Most caption generators only know your brand, so they write something that sounds like you but has nothing to do with the post. Krumzi reads the actual post.

When you generate a caption, the server re-opens the design you selected and lifts the copy off its text elements in reading order. Headline first, then supporting text, then the CTA. For carousels it does this slide by slide, so the caption follows the narrative you built.

If you uploaded an image instead of picking a design, Krumzi shows the image to the model directly.

Where the voice comes from

The tone comes from your Brand Mind. Specifically it uses your brand summary, your custom instructions, your tone, your audience, what you offer, and any phrases you've told it to avoid.

So the caption is grounded in the post's content and written in your voice, rather than being generically upbeat.

When a post has nothing to read

If a post has no text and no image the model can see, Krumzi tells it to stay on-brand and generic. It will not invent an offer, a price, a deadline, or a claim just to fill space. You get something safe that you can build on, rather than something confidently wrong.

Editing what you get

The caption drops straight into the field, and it's yours to edit. Nothing is locked. Generate again if the angle isn't right, or write over the top of it.

Different captions per platform

Generate once, then add a per-platform override and tweak. Instagram tends to want more hashtags and a punchier hook, Facebook tends to want a bit more context. Same idea, two shapes.

Tips

  • Put your real hook on the design. The better the copy on the canvas, the better the caption, because that's what it reads.

  • Fill in the phrases-to-avoid field in Brand Mind if the AI keeps reaching for a word you hate.

  • Generate the caption last, after the design is final, so it reflects what you actually shipped.