What is the difference between PEM and DER certificate formats?

PEM (Privacy Enhanced Mail) is a text-based format using Base64 encoding, readable in any text editor and starting with '-----BEGIN CERTIFICATE-----'. DER (Distinguished Encoding Rules) is a binary format that contains the same certificate data but in raw bytes, typically used in Windows and Java environments. Both formats contain identical certificate information but are encoded differently for compatibility with different systems.

Is my SSL certificate data safe when using this converter?

Yes, your SSL certificate data is completely safe. All processing happens client-side within your browser using JavaScript, meaning your certificate never leaves your device or is sent to any server. This ensures maximum privacy and security—no data is stored, logged, or transmitted anywhere.

Can I convert multiple SSL certificates at once?

The SSL Certificate Format Converter processes one certificate at a time to ensure accuracy and prevent errors. If you need to convert multiple certificates, you can repeat the conversion process for each certificate individually. The tool is designed for quick conversions, so processing multiple certificates sequentially is efficient.

Which web servers require PEM format and which require DER?

Apache, Nginx, and most Linux-based servers typically use PEM format for SSL certificates. Windows-based servers like IIS, Java applications, and some mobile platforms often require DER format. Always check your specific server or application documentation to confirm the required format before installation.

Do I need any special software or tools installed to use this converter?

No, the SSL Certificate Format Converter works entirely in your web browser without requiring any software installation. Simply open the tool in any modern web browser (Chrome, Firefox, Safari, Edge) and start converting your certificates immediately. No plugins, extensions, or command-line tools are needed.

SSL Certificate Format Converter

🔒Dữ liệu xử lý ngay trên trình duyệt, không gửi lên server

Dán nội dung chứng chỉ SSL

Định dạng đầu vào

Định dạng đầu ra

How to Use SSL Certificate Format Converter

When to Use SSL Certificate Format Converter

🔒Need an SSL certificate?

Protect your website with BKNS SSL — from 199,000đ/year, free installation

Buy SSL

SSL Certificate Format Converter

How to Use SSL Certificate Format Converter

When to Use SSL Certificate Format Converter

Technical Information

Frequently Asked Questions