Certificate of Completion template

The certificate-of-completion template renders a business image as a PNG. POST a JSON payload to the endpoint below and you receive a CDN URL in the response.

Endpoint

POST https://app.html2img.com/api/v1/templates/certificate-of-completion
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:

Defaults

Defaults applied automatically when not overridden in the request:

Code examples

curl -X POST https://app.html2img.com/api/v1/templates/certificate-of-completion \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"recipient_name":"Margaret Lin","course_name":"Foundations of Production Engineering","completion_date":"April 30, 2026","issuer_name":"Halberd Software Academy","issuer_title":"Director of Education","issuer_signature_url":"https://i.html2img.com/static/sample-signature.png","certificate_id":"HSA-2026-009421","accent_color":"#1F2937"}'

<?php
$response = \Illuminate\Support\Facades\Http::withHeaders([
    'X-API-Key' => 'YOUR_API_KEY',
])->post('https://app.html2img.com/api/v1/templates/certificate-of-completion', ['recipient_name' => 'Margaret Lin', 'course_name' => 'Foundations of Production Engineering', 'completion_date' => 'April 30, 2026', 'issuer_name' => 'Halberd Software Academy', 'issuer_title' => 'Director of Education', 'issuer_signature_url' => 'https://i.html2img.com/static/sample-signature.png', 'certificate_id' => 'HSA-2026-009421', 'accent_color' => '#1F2937']);

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

const response = await fetch('https://app.html2img.com/api/v1/templates/certificate-of-completion', {
  method: 'POST',
  headers: {
    'X-API-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "recipient_name": "Margaret Lin",
    "course_name": "Foundations of Production Engineering",
    "completion_date": "April 30, 2026",
    "issuer_name": "Halberd Software Academy",
    "issuer_title": "Director of Education",
    "issuer_signature_url": "https://i.html2img.com/static/sample-signature.png",
    "certificate_id": "HSA-2026-009421",
    "accent_color": "#1F2937"
}),
});

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

import requests

response = requests.post(
    'https://app.html2img.com/api/v1/templates/certificate-of-completion',
    headers={'X-API-Key': 'YOUR_API_KEY'},
    json={'recipient_name': 'Margaret Lin', 'course_name': 'Foundations of Production Engineering', 'completion_date': 'April 30, 2026', 'issuer_name': 'Halberd Software Academy', 'issuer_title': 'Director of Education', 'issuer_signature_url': 'https://i.html2img.com/static/sample-signature.png', 'certificate_id': 'HSA-2026-009421', 'accent_color': '#1F2937'},
)

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": "certificate-of-completion"
}

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

Other templates in the business and commerce category:

• Business card - Digital and print-ready business cards in three layout variants
• Coupon and voucher - Promotional voucher images sized for email body and SMS preview
• Event ticket - Print- and email-ready tickets with QR/barcode slot and perforated stub
• Invoice image - Render full invoices as PNG images for emails, dashboards, and exports
• Real estate listing - Property listing cards for MLS exports, social shares, and email blasts
• Receipt image - Compact order receipts for confirmation emails and thank-you screens

Browse by category

A starting point from each of the other template categories. The templates index lists every reference page.

Social media: Facebook post , Instagram square post

Content and marketing: Blog hero image , Code screenshot

See the Certificate of Completion marketing page for sample renders and use cases.