Skip to content

Instantly share code, notes, and snippets.

@msrivastav13

msrivastav13/CertificatePdfGenerator.apex

Created January 12, 2026 04:36
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save msrivastav13/3cdf1704262121385d58eb2c29c07d9e to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save msrivastav13/3cdf1704262121385d58eb2c29c07d9e to your computer and use it in GitHub Desktop.
Download ZIP
Demonstrates Blob.toPdf() with Visualforce PDF Rendering
Raw
CertificatePdfGenerator.apex
/**
* CertificatePdfGenerator - Demonstrates Blob.toPdf() with Visualforce PDF Rendering
*
* Spring '26 Release Update:
* Blob.toPdf() now uses the Visualforce PDF rendering service which provides:
* - Expanded font support including multibyte characters (CJK - Chinese, Japanese, Korean)
* - Default font changed from serif to sans-serif
* - Consistent rendering across the Salesforce Platform
* When: Enforced in Summer '26. Check Trust Status for your instance's upgrade date.
*
* @since API Version 66.0
*/
public with sharing class CertificatePdfGenerator {
/**
* Generates a professional certificate PDF
*
* @param recipientName Name of the certificate recipient
* @param courseName Name of the completed course
* @param completionDate Date of completion
* @param instructorName Name of the instructor
* @return Blob The generated certificate PDF
*/
public static Blob generateCertificate(
String recipientName,
String courseName,
Date completionDate,
String instructorName
) {
String htmlContent = buildCertificateHtml(recipientName, courseName, completionDate, instructorName);
// The magic happens here - Blob.toPdf() now uses Visualforce rendering!
return Blob.toPdf(htmlContent);
}
/**
* Generates a certificate and saves it to Salesforce Files
*
* @param fileName Name for the PDF file (without extension)
* @param recipientName Name of the certificate recipient
* @param courseName Name of the completed course
* @param completionDate Date of completion
* @param instructorName Name of the instructor
* @return Id The ContentVersion Id of the saved file
*/
public static Id generateAndSaveToFiles(
String fileName,
String recipientName,
String courseName,
Date completionDate,
String instructorName
) {
// Generate the PDF using the new Visualforce rendering service
Blob pdfBlob = generateCertificate(recipientName, courseName, completionDate, instructorName);
// Save to Salesforce Files (ContentVersion)
ContentVersion cv = new ContentVersion();
cv.Title = fileName;
cv.PathOnClient = fileName + '.pdf';
cv.VersionData = pdfBlob;
cv.IsMajorVersion = true;
insert cv;
return cv.Id;
}
/**
* Builds the HTML content for a professional certificate
* Demonstrates CSS styling capabilities with the new rendering engine
*/
private static String buildCertificateHtml(
String recipientName,
String courseName,
Date completionDate,
String instructorName
) {
return '<!DOCTYPE html>' +
'<html>' +
'<head>' +
'<style>' +
// Body styling with gradient background
'body { ' +
' font-family: "Georgia", serif; ' +
' margin: 0; ' +
' padding: 40px; ' +
' background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);' +
'}' +
// Certificate border with double gold line
'.certificate-border {' +
' border: 8px double #c9a227;' +
' background: white;' +
' padding: 50px;' +
' text-align: center;' +
'}' +
// Header with letter spacing
'.certificate-header {' +
' color: #c9a227;' +
' font-size: 14px;' +
' letter-spacing: 8px;' +
' text-transform: uppercase;' +
' margin-bottom: 20px;' +
'}' +
// Main title
'.certificate-title {' +
' font-size: 42px;' +
' color: #333;' +
' margin-bottom: 30px;' +
' font-family: "Times New Roman", serif;' +
'}' +
// Descriptive text
'.certificate-text {' +
' color: #666;' +
' font-size: 16px;' +
' margin-bottom: 15px;' +
'}' +
// Recipient name with underline
'.recipient-name {' +
' font-size: 36px;' +
' color: #0070d2;' +
' font-family: "Trebuchet MS", sans-serif;' +
' margin: 30px 0;' +
' padding-bottom: 10px;' +
' border-bottom: 2px solid #c9a227;' +
' display: inline-block;' +
'}' +
// Course name
'.course-name {' +
' font-size: 24px;' +
' color: #333;' +
' font-weight: bold;' +
' margin: 20px 0;' +
'}' +
// Date styling
'.certificate-date {' +
' color: #999;' +
' font-size: 14px;' +
' margin-top: 30px;' +
'}' +
// Signature line
'.signature-line {' +
' border-top: 1px solid #333;' +
' width: 200px;' +
' padding-top: 10px;' +
' font-size: 12px;' +
' color: #666;' +
'}' +
'</style>' +
'</head>' +
'<body>' +
'<div class="certificate-border">' +
'<div class="certificate-header">Certificate of Completion</div>' +
'<div class="certificate-title">Achievement Award</div>' +
'<div class="certificate-text">This is to certify that</div>' +
'<div class="recipient-name">' + String.escapeSingleQuotes(recipientName) + '</div>' +
'<div class="certificate-text">has successfully completed the course</div>' +
'<div class="course-name">' + String.escapeSingleQuotes(courseName) + '</div>' +
'<div class="certificate-date">Completed on ' + completionDate.format() + '</div>' +
// Signature section
'<table style="width: 100%; margin-top: 40px;">' +
'<tr>' +
'<td style="text-align: center; width: 50%;">' +
'<div class="signature-line">' + String.escapeSingleQuotes(instructorName) + '<br/>Instructor</div>' +
'</td>' +
'<td style="text-align: center; width: 50%;">' +
'<div class="signature-line">Salesforce<br/>Training Authority</div>' +
'</td>' +
'</tr>' +
'</table>' +
'</div>' +
'</body>' +
'</html>';
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment