---
canonical: 'https://htmlcsstoimage.com/templates/playground?preset=heRKVS3g'
title: 'Template Editor: Start with Workout Challenge Post Instagram Post (Square) Template'
description: 'Customize the Workout Challenge Post Instagram Post (Square) Template in the HTML/CSS to Image template editor, then save it for API image generation.'
---

# Template Editor: Start with Workout Challenge Post Instagram Post (Square) Template

Customize the Workout Challenge Post Instagram Post (Square) Template in the HTML/CSS to Image template editor, then save it for API image generation.

The HTML/CSS to Image API (HCTI) creates images, PDFs, and website screenshots from HTML/CSS, live URLs, or reusable templates. It also supports visual template editing, automated Open Graph images, signed image URLs, batch rendering, direct-to-storage output, and an OAuth-connected MCP server for AI agents.

The template playground is the browser-based visual editor for reusable image templates: configure the canvas, compose blocks, add variables, preview placeholder values, and save the result for rendering through the API.

## What you can do

- Build layouts from text, images, shapes, panels, and other reusable blocks.
- Define variables for content and styling that changes between renders.
- Preview the template with realistic values before saving it.
- Render saved templates through the HTML/CSS to Image API.

## Loaded preset

[Workout Challenge Post](https://htmlcsstoimage.com/templates/details/workout-challenge-post/instagram-post-square.md)

## Template details

- **Preset:** Workout Challenge Post
- **Variation:** Instagram Post (Square)
- **Size:** Instagram Post (Square)
- **Categories:** Exercise & Fitness
- **Types:** Social Post

## Examples

![Workout Challenge Post preview](<https://content-images.htmlcsstoimage.com/media-assets/706e3eeb40c389d1b445fb42ae9b3ebaa1bff510fcc6fab4b3525900bb896487/example-image-019ef56b-5d30-785f-b901-60313269a44b.png?v=auto&iv=2>)

Example variable values:

```json
{
  "date": "Starts July 1",
  "note": "20 minutes a day. No perfect weeks required.",
  "coach": "Coach Avery Lane",
  "focus": "Strength \u00B7 Mobility \u00B7 Conditioning",
  "title": "Stronger by Saturday",
  "kicker": "14 Day Challenge"
}
```

## Similar templates to try

- [Customer Review Post](https://htmlcsstoimage.com/templates/details/customer-review-post.md): Turn a customer quote, star rating, or product review into social proof that looks intentional and trustworthy.
- [Speaker Spotlight Post](https://htmlcsstoimage.com/templates/details/speaker-spotlight-post.md): Introduce a speaker, panelist, host, or guest expert with a profile-style post for conferences and webinars.
- [Training Webinar Banner](https://htmlcsstoimage.com/templates/details/training-webinar-banner.md): A banner for webinars and live training sessions.
- [Just Listed](https://htmlcsstoimage.com/templates/details/just-listed.md): Share a new listing with a square social graphic that highlights the property photo, price, address, and strongest selling point.
- [Market Brief Post](https://htmlcsstoimage.com/templates/details/market-brief-post.md): Share a market note, finance update, analyst takeaway, or investment commentary in a clean social format.
- [Quick Course Tip Post](https://htmlcsstoimage.com/templates/details/quick-course-tip-post.md): Share one useful teaching point, study prompt, or classroom takeaway in a square post made for course creators and educators.

## Get started

- [View the full page](https://htmlcsstoimage.com/templates/playground?preset=heRKVS3g)
- [Browse templates](https://htmlcsstoimage.com/templates.md)
- [Open the template playground](https://htmlcsstoimage.com/templates/playground.md)
- [Learn how the visual template editor works](https://htmlcsstoimage.com/features/template-editor.md)
- [Read the template API documentation](https://docs.htmlcsstoimage.com/getting-started/templates/)

Rendering or saving a template requires authenticated HTML/CSS to Image API credentials. Keep API keys in trusted server-side configuration. If credentials are not available, ask the user to configure an API key securely, then follow the template API documentation.