image-resizer

Generate IG and Facebook image variants with ImageMagick and optional Gemini outpaint.

Updated Aug 27, 2026

Search Tags:#social-media #image-variants #image-resizing #platform-automation #imagick #outpaint

Ready to run

npx skills add https://github.com/Dunc4nJ/agent-skills --skill image-resizer

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: image-resizer
Source: https://github.com/Dunc4nJ/agent-skills/tree/main/skills/image-resizer
Command: npx skills add https://github.com/Dunc4nJ/agent-skills --skill image-resizer

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill automates the creation of platform-specific image variants from refined images, removing manual resizing and reformatting steps to ensure consistent quality across social channels.

Core Features & Use Cases

Generate ig-feed, ig-story, and fb-feed variants from refined images using ImageMagick by default, with optional Gemini outpaint when aspect ratios require content generation.
Maintain per-image variants manifests and update source statuses to ready after successful processing, enabling batch campaigns and scheduled posts.
Suitable for content teams and social media managers who need fast, repeatable cross-platform image assets with consistent branding.

Quick Start

Supply refined images and your target platforms to generate platform-specific image variants.

Frequently Asked Questions about image-resizer

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I automate resizing images for social media platforms like Instagram and Facebook?▼

Automating social media image resizing involves processing refined images through ImageMagick to generate platform-specific variants like ig-feed, ig-story, and fb-feed. This ensures consistent quality across channels by applying deterministic resizing and maintaining per-image variant manifests.

What's the best way to handle aspect ratio changes when generating image variants for social media?▼

Handling aspect ratio changes for social media image variants requires optional Gemini outpaint to extend the canvas when simple resizing is insufficient. This approach generates missing content during canvas extension, ensuring cross-platform assets maintain consistent visual branding.

How do I generate Instagram story and feed variants from a single source image?▼

Generating Instagram story and feed variants from a single source image uses deterministic ImageMagick resizing by default. The workflow outputs platform-ready assets and updates source statuses to ready, while maintaining per-image variant manifests for batch campaigns.

Does Gemini outpaint work with ImageMagick for social media image resizing workflows?▼

Gemini outpaint works alongside ImageMagick for social media image resizing when aspect ratio changes demand canvas extension. ImageMagick handles deterministic resizing by default, while the optional Gemini outpaint generates extended canvas content via a browser workflow.

Can I use this image resizing approach for batch campaigns and scheduled social media posts?▼

This image resizing approach supports batch campaigns and scheduled social media posts by maintaining per-image variant manifests and updating source statuses to ready after successful processing. It enables content teams to prepare fast, repeatable cross-platform assets.

What are the limitations of using ImageMagick for social media image variants?▼

ImageMagick limitations for social media image variants occur when aspect ratio changes require canvas extension rather than simple resizing. In these cases, deterministic resizing alone is insufficient, requiring optional Gemini outpaint to generate new content for the extended canvas.