Docs / Templates / Instagram Square Post template

Instagram Square Post template

The instagram-square-post template renders a social image as a PNG. POST a JSON payload to the endpoint below and you receive a CDN URL in the response.

Endpoint

POST https://html2img.com/api/v1/templates/instagram-square-post
X-API-Key: <your-api-key>
Content-Type: application/json

Authentication uses the X-API-Key header. See the authentication docs for details on issuing and rotating keys.

Inputs

The full set of inputs the template accepts:

Name	Type	Required	Description	Example
`title`	string	Yes	Main headline shown in the image.	`Summer drop is live`
`subtitle`	string	No	Secondary line of text shown below the title.	`Hand-printed tees, limited run of 200.`
`eyebrow`	string	No	Text value for the eyebrow.	`NEW COLLECTION`
`cta`	string	No	Text value for the cta.	`Shop now → studioink.co`
`background_image_url`	url	No	URL of the background image to include in the rendered image.	`https://picsum.photos/seed/insta-square/1080/1080`
`logo_url`	url	No	URL of the logo to include in the rendered image.	`—`
`background_color`	string	No	Hex colour code for the background.	`#111111`
`accent_color`	string	No	Hex colour code for the accent.	`#F472B6`

Defaults

Defaults applied automatically when not overridden in the request:

Option	Default value
`width`	`1080`
`height`	`1080`

Code examples

curl -X POST https://app.html2img.com/api/v1/templates/instagram-square-post \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"title":"Summer drop is live","subtitle":"Hand-printed tees, limited run of 200.","eyebrow":"NEW COLLECTION","cta":"Shop now \u2192 studioink.co","background_image_url":"https://picsum.photos/seed/insta-square/1080/1080","background_color":"#111111","accent_color":"#F472B6"}'

<?php
$response = \Illuminate\Support\Facades\Http::withHeaders([
    'X-API-Key' => 'YOUR_API_KEY',
])->post('https://app.html2img.com/api/v1/templates/instagram-square-post', ['title' => 'Summer drop is live', 'subtitle' => 'Hand-printed tees, limited run of 200.', 'eyebrow' => 'NEW COLLECTION', 'cta' => 'Shop now → studioink.co', 'background_image_url' => 'https://picsum.photos/seed/insta-square/1080/1080', 'background_color' => '#111111', 'accent_color' => '#F472B6']);

$url = $response->json('url');

const response = await fetch('https://app.html2img.com/api/v1/templates/instagram-square-post', {
  method: 'POST',
  headers: {
    'X-API-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "title": "Summer drop is live",
    "subtitle": "Hand-printed tees, limited run of 200.",
    "eyebrow": "NEW COLLECTION",
    "cta": "Shop now \u2192 studioink.co",
    "background_image_url": "https://picsum.photos/seed/insta-square/1080/1080",
    "background_color": "#111111",
    "accent_color": "#F472B6"
}),
});

const { url } = await response.json();

import requests

response = requests.post(
    'https://app.html2img.com/api/v1/templates/instagram-square-post',
    headers={'X-API-Key': 'YOUR_API_KEY'},
    json={'title': 'Summer drop is live', 'subtitle': 'Hand-printed tees, limited run of 200.', 'eyebrow': 'NEW COLLECTION', 'cta': 'Shop now → studioink.co', 'background_image_url': 'https://picsum.photos/seed/insta-square/1080/1080', 'background_color': '#111111', 'accent_color': '#F472B6'},
)

url = response.json()['url']

Looking for a fuller integration sketch in your language? The usage guides cover PHP, Laravel, Rails, Python, JavaScript, React and Vue.

Response

A successful render returns:

{
  "success": true,
  "id": "abc123",
  "url": "https://i.html2img.com/abc123.png",
  "credits_remaining": 1234,
  "template": "instagram-square-post"
}

The url field is a CDN URL for the rendered PNG. credits_remaining tracks your monthly quota. Shared response fields are documented in the API parameters reference.

Errors

The template endpoint returns the following error responses:

422 Validation failed

Returned when one or more inputs fail validation. The errors object lists field-specific messages.

{
  "success": false,
  "error": "validation_failed",
  "errors": {
    "title": ["The title field is required."]
  }
}

404 Template not found

Returned with {"code": "template_not_found"} if the slug is not registered. Check the template list for current slugs.

401 Unauthorised

Missing or invalid API key. See the authentication docs.

429 Too many requests

You have hit the rate limit or used your monthly credits. The pricing page covers higher-volume plans.

Related templates

Open Graph Image — Generate dynamic Open Graph images from JSON
Twitter/X Post Image — Generate share-ready images sized for Twitter/X posts
YouTube Thumbnail — High-contrast 16:9 thumbnails optimized for click-through
Facebook Post Image — Bold share images sized for Facebook feed posts

See the Instagram Square Post template in our gallery for sample renders and use cases.

Documentation