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Use Case · Instagram

How to Create Instagram Posts with AI

Create professional Instagram feed posts automatically in your brand style — AI-generated design and captions that drive engagement.

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Made in Switzerland · 3-day free trial
Dario Kunz · Co-Founder & Tech Lead, publy.ch
Updated May 12, 2026

What are Instagram Posts?

Instagram posts are permanent feed entries that form the visual archive of your brand on the platform. Each post consists of an image or graphic (square 1080×1080 px, portrait 1080×1350 px, or landscape 1080×566 px), a caption of up to 2,200 characters, and optional hashtags, location tags, and product tags. Unlike Stories, posts do not disappear after 24 hours — they build a lasting impression of how your brand looks and sounds.

For US small businesses and solopreneurs, Instagram posts are the backbone of social media presence. Roughly 71% of US businesses use Instagram, and image posts average a 1.74% engagement rate — well above text-only platforms. A consistent feed with on-brand visuals increases brand recall and trust with potential customers. The challenge for owner-operators is time: producing daily posts in Photoshop or Canva eats 30–60 minutes each. AI-assisted content generation closes that gap and lets you publish quality posts without a design degree.

How to create Instagram Posts with publy.ch

With publy.ch you create Instagram posts in minutes, fully on brand:

  1. Set up your brand kit — during onboarding the AI scans your website or existing materials and extracts your colors, fonts, and logo automatically.
  2. Pick a template — choose from dozens of professional layouts: quote posts, product highlights, tips graphics, announcements, and more.
  3. Generate the caption — the AI writes a US-English caption with hashtag suggestions tuned to your niche. Edit it inline or accept as-is.
  4. Refine the design — adjust text, swap colors, drop in your product photo with drag-and-drop. Brand kit rules stay locked.
  5. Export or schedule — download as PNG or schedule directly to your Instagram business account via the built-in calendar.

Each post takes under 5 minutes end to end. No Photoshop, no Adobe subscription, no agency retainer.

Best Practices for Instagram Posts

  1. Stay visually consistent. Use the same colors, fonts, and photo treatment across every post. publy.ch enforces this through your brand kit.
  2. Favor portrait format. 1080×1350 px takes up more screen real estate in the feed and consistently outperforms square posts on engagement.
  3. Keep on-image text minimal. Roughly 20% of the canvas as text is a sensible ceiling — heavier text reduces reach.
  4. Hook in the first line of the caption. Instagram truncates captions after 125 characters; the visible portion must earn the tap to expand.
  5. Use 5–10 strategic hashtags. Mix niche tags (under 100k posts) with mid-volume tags. Stuffing 30 generic tags is a 2018 tactic that no longer works.
  6. End with a clear call to action. "Save this for later," "Tap the link in bio," or "Comment your favorite" all outperform passive captions.
  7. Post at peak US hours. Tuesday through Friday, 11 a.m.–1 p.m. ET, is the broad sweet spot for B2C feeds; B2B accounts often see better results 8–9 a.m. ET.
  8. Aim for 3–5 posts per week. Daily is great if you can sustain it; consistency beats sporadic bursts.

Formats and Dimensions

  • Square: 1080 × 1080 px (1:1)
  • Portrait (recommended): 1080 × 1350 px (4:5)
  • Landscape: 1080 × 566 px (1.91:1)
  • File formats: JPG, PNG (up to 30 MB)
  • Color profile: sRGB
  • Caption length: up to 2,200 characters (150–300 reads best)
  • Hashtags: maximum 30, recommended 5–10

Common Mistakes to Avoid

  • Inconsistent branding. Jumping between fonts and color palettes makes a feed look amateur. Lock a brand kit in early.
  • Walls of on-image text. Heavy text suppresses reach and rarely gets read. Move long copy to the caption.
  • No call to action. Posts without a CTA leave engagement on the table. Always tell viewers what to do next.
  • Low-resolution exports. Pixelated or blurry images hurt trust. Always export at the recommended size.
  • Posting without a plan. Random topics confuse your audience. Build content pillars — 3 to 5 recurring themes — and rotate them.

Create Instagram Posts with AI — Try publy.ch Free for 3 Days

With publy.ch you can generate professional, on-brand Instagram posts in minutes. The brand kit keeps every post visually consistent, the AI writes captions tuned for US audiences, and the integrated calendar handles scheduling. Start your 3-day free trial and see your first post live in under five minutes.