Certificate Generation API: Automate Awards & Diplomas

Last month, an online course instructor messaged me in a panic. She'd just sold 847 spots for her coaching program and needed to send personalized certificates to every graduate. One by one. In Canva.

That's roughly 40 hours of copy-paste work. She didn't have 40 hours.

We set up automated certificate generation in about 20 minutes. The API handled the rest. If you're still creating certificates manually—for courses, employee awards, training completions, or events—this guide shows you a better way.

Why automate certificate generationWhy Automate Certificate Generation?

Manually creating certificates seems manageable until it isn't. Ten certificates? Fine. A hundred? Painful. A thousand? Impossible to do well.

Automation solves three problems at once:

Speed: Generate hundreds of certificates in seconds, not hours. The API doesn't need coffee breaks.

Accuracy: No more typos in recipient names. Data flows directly from your source system to the certificate.

Consistency: Every certificate looks identical except for the personalized fields. No accidental font changes or alignment drift.

How certificate generation apis workHow Certificate Generation APIs Work

The process is simpler than you'd expect:

1. Design your template with placeholder fields (name, date, course title, etc.)
2. Mark fields as editable so the API knows what to change
3. Call the API with recipient data
4. Receive the image instantly—PNG, JPEG, or WebP

Here's what a basic API call looks like with Imejis.io:

curl -X POST "https://render.imejis.io/v1/your-certificate-template-id" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "recipientName": "Sarah Johnson",
    "courseName": "Advanced Python Programming",
    "completionDate": "January 15, 2026",
    "instructorName": "Dr. Michael Chen"
  }'

The response? A ready-to-send certificate image with Sarah's name, the course title, and completion date already filled in.

Use cases for automated certificatesUse Cases for Automated Certificates

Certificate generation isn't just for schools. Here's where businesses actually use it:

Online courses and e learningOnline Courses and E-Learning

The most common use case. Students complete a course, trigger fires, certificate generates. Platforms like Teachable, Thinkific, and custom LMS systems all benefit.

What you'll need:

• Template with student name, course name, completion date
• Webhook trigger when course completes
• API call to generate certificate
• Email delivery with attachment

Employee recognition programsEmployee Recognition Programs

HR teams love automated awards. Monthly recognitions, years-of-service awards, and training completions all work beautifully.

Example fields:

• Employee name
• Award type (Employee of the Month, 5 Years Service, etc.)
• Date awarded
• Manager signature (static image in template)

Event participationEvent Participation

Conferences, webinars, and workshops can issue attendance certificates automatically. Attendee data feeds directly into the generation system.

Professional certificationsProfessional Certifications

Training providers issue certificates for CPE credits, continuing education, and professional development. Compliance requirements often mandate specific formatting—templates handle that perfectly.

Academic diplomasAcademic Diplomas

Schools and universities can generate graduation certificates, honor roll recognition, and academic achievement awards at scale.

Building your first certificate templateBuilding Your First Certificate Template

Good certificate templates balance professionalism with clarity. Here's what matters:

Essential elementsEssential Elements

Design tipsDesign Tips

Keep text fields generous. "Dr. Alexander Maximilian von Hohenstein III" needs more space than "Sam Lee." Build templates that handle both.

Use readable fonts. Fancy script fonts look nice until someone can't read their own name. Save the flourishes for borders.

Include a verification element. A unique certificate ID or QR code helps recipients (and employers) verify authenticity.

Match your brand. Colors, logos, and styling should reflect your organization. Consistency builds recognition.

Code examples for different languagesCode Examples for Different Languages

NodejsNode.js

const axios = require('axios');
const fs = require('fs');
 
async function generateCertificate(recipientData) {
  const response = await axios({
    method: 'post',
    url: 'https://render.imejis.io/v1/your-certificate-template-id',
    headers: {
      'Authorization': 'Bearer YOUR_API_KEY',
      'Content-Type': 'application/json'
    },
    data: {
      recipientName: recipientData.name,
      courseName: recipientData.course,
      completionDate: recipientData.date,
      certificateId: `CERT-${Date.now()}`
    },
    responseType: 'arraybuffer'
  });
 
  fs.writeFileSync(`certificates/${recipientData.name}.png`, response.data);
  console.log(`Certificate generated for ${recipientData.name}`);
}
 
// Generate certificates for multiple recipients
const graduates = [
  { name: 'Emma Wilson', course: 'Data Science Fundamentals', date: '2026-01-20' },
  { name: 'James Rodriguez', course: 'Data Science Fundamentals', date: '2026-01-20' },
  { name: 'Aisha Patel', course: 'Data Science Fundamentals', date: '2026-01-20' }
];
 
graduates.forEach(generateCertificate);

PythonPython

import requests
import os
 
def generate_certificate(recipient_name, course_name, completion_date):
    url = "https://render.imejis.io/v1/your-certificate-template-id"
 
    headers = {
        "Authorization": "Bearer YOUR_API_KEY",
        "Content-Type": "application/json"
    }
 
    payload = {
        "recipientName": recipient_name,
        "courseName": course_name,
        "completionDate": completion_date,
        "certificateId": f"CERT-{os.urandom(4).hex()}"
    }
 
    response = requests.post(url, headers=headers, json=payload)
 
    if response.status_code == 200:
        filename = f"certificates/{recipient_name.replace(' ', '_')}.png"
        with open(filename, 'wb') as f:
            f.write(response.content)
        print(f"Certificate saved: {filename}")
    else:
        print(f"Error: {response.status_code}")
 
# Example usage
generate_certificate("Maria Santos", "Leadership Excellence", "February 5, 2026")

PhpPHP

<?php
 
function generateCertificate($recipientName, $courseName, $completionDate) {
    $url = "https://render.imejis.io/v1/your-certificate-template-id";
 
    $data = json_encode([
        "recipientName" => $recipientName,
        "courseName" => $courseName,
        "completionDate" => $completionDate,
        "certificateId" => "CERT-" . uniqid()
    ]);
 
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        "Authorization: Bearer YOUR_API_KEY",
        "Content-Type: application/json"
    ]);
 
    $response = curl_exec($ch);
    curl_close($ch);
 
    $filename = "certificates/" . str_replace(" ", "_", $recipientName) . ".png";
    file_put_contents($filename, $response);
 
    return $filename;
}
 
// Generate certificate
$file = generateCertificate("Robert Chen", "Project Management", "January 28, 2026");
echo "Generated: " . $file;
?>

Integrating with your existing systemsIntegrating with Your Existing Systems

You don't need to write code if you're using common platforms. Here's how certificate automation connects to popular tools:

Learning management systems lmsLearning Management Systems (LMS)

Most LMS platforms support webhooks or Zapier integration. When a student completes a course:

1. LMS triggers a webhook or Zapier event
2. Automation calls the certificate API with student data
3. Certificate generates and saves to cloud storage
4. Email sends with certificate attached

This works with Teachable, Thinkific, LearnDash, and custom solutions.

Hr systemsHR Systems

Connect to BambooHR, Workday, or similar platforms via Zapier or Make. Trigger certificate generation for:

• New hire onboarding completions
• Annual review milestones
• Training certifications
• Anniversary recognitions

Google sheets or airtableGoogle Sheets or Airtable

The simplest approach for manual triggers. Add a row with recipient data, automation generates the certificate. Great for small batches or one-off awards. If you're new to API-based image generation, our beginner's guide covers the fundamentals. Check out our templates library for ready-to-use certificate designs.

Event platformsEvent Platforms

Eventbrite, Hopin, and Zoom webinar integrations can trigger certificates for attendance. Attendee data flows automatically—no manual entry needed.

No code workflow zapier exampleNo-Code Workflow: Zapier Example

Here's a complete Zapier workflow for course completion certificates:

Trigger: New course completion in Teachable

Step 1: Generate image with Imejis.io

• Template: Certificate template ID
• Recipient Name: {{Student Name}}
• Course Name: {{Course Name}}
• Completion Date: {{Completion Date}}

Step 2: Upload file to Google Drive

• Save certificate to organized folder

Step 3: Send email via Gmail

• To: {{Student Email}}
• Subject: "Your Certificate of Completion"
• Attachment: File from Step 2

Total setup time? Under 30 minutes. And it runs forever without intervention.

Pricing considerationsPricing Considerations

Certificate generation pricing typically works per-image. Here's what affects cost:

With Imejis.io's pricing, generating 1,000 certificates per month costs around $24.99 on the Pro plan—roughly 2.5 cents each. Compare that to the hours you'd spend doing it manually.

For lower volumes, the free tier includes 100 API calls monthly. That's enough for most small programs to get started without paying anything.

Best practices for certificate programsBest Practices for Certificate Programs

Verification systemsVerification Systems

Add QR codes or unique IDs that link to verification pages. This prevents fraud and helps recipients prove their credentials. According to the Council for Higher Education Accreditation, credential verification is increasingly important as digital certificates become standard.

Email deliveryEmail Delivery

Don't just attach the image. Include:

• Congratulations message
• What the certificate represents
• How to share or display it
• Verification instructions
• Contact for questions

Branding consistencyBranding Consistency

Use the same template design across all certificates in a program. Different designs for different achievement levels are fine, but maintain visual cohesion.

Data backupData Backup

Store generated certificates somewhere recoverable. Cloud storage with automatic backup works well. Recipients will lose their copies and ask for replacements.

AccessibilityAccessibility

Consider text-based alternatives for screen readers. While the certificate image is primary, include achievement details in the email body too.

FaqFAQ

How long does it take to generate a certificateHow long does it take to generate a certificate?

Most certificates generate in under 2 seconds. Imejis.io returns images directly without requiring webhooks, so you get instant responses. Even bulk generation of hundreds of certificates completes in minutes.

Can i include signatures on automated certificatesCan I include signatures on automated certificates?

Yes. Add signature images as static elements in your template. They'll appear on every generated certificate without needing to be passed through the API.

What image formats work for certificatesWhat image formats work for certificates?

PNG works best for certificates because it preserves text sharpness and supports transparency. JPEG is fine if file size matters more than quality. WebP offers good compression with quality retention.

How do i handle international characters in namesHow do I handle international characters in names?

The API supports UTF-8 encoding, so names with accents, Asian characters, and special symbols render correctly. Just ensure your template fonts include the character sets you need.

Can recipients verify their certificates onlineCan recipients verify their certificates online?

Yes, if you build a verification system. Include a unique certificate ID in each generated image, store the data in your database, and create a simple lookup page. QR codes work well for mobile verification.

Start generating certificates todayStart Generating Certificates Today

Manual certificate creation doesn't scale. At some point—10 recipients, 100, or 1,000—automation becomes necessary.

The good news? Getting started takes less time than creating five certificates by hand. Design one template, connect your data source, and let the API handle the rest.

Every course completion, employee recognition, and event attendance becomes an automatic, professional certificate without any extra work on your end.

Start your free trial with Imejis.io →