Convert CER to PEM Free — Online & Instant

Convert CER to PEM — Free Online

Fast, secure, no software needed.

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✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install

How to Convert CER to PEM

Converting .cer files to .pem is fast and simple with OpenAnyFile. CER is a security format: CER is a certificate file in DER or Base64 format. PEM is a security format: PEM is Base64-encoded certificate or key file.

Upload your .cer file to OpenAnyFile
Select PEM (.pem) as the target format
Click "Convert" and wait for processing
Download your converted .pem file

Why Convert CER to PEM?

There are several reasons to convert from .cer to .pem:

Compatibility: .pem may be more widely supported by software and devices
File size: Converting between formats can reduce file size for easier sharing
Editing: PEM may offer better editing capabilities for your workflow
Sharing: Recipients may prefer .pem files for their daily use

About CER Format

CER is a certificate file in DER or Base64 format. Category: Security. Extension: .cer. Created by: Various.

About PEM Format

PEM is Base64-encoded certificate or key file. Category: Security. Extension: .pem. Created by: Various.

Frequently Asked Questions

How do I convert .cer to .pem?

Upload your .cer file to OpenAnyFile, select PEM as the target, and download the converted file.

Is CER to PEM conversion free?

OpenAnyFile offers free file analysis. Conversion may require a one-time payment depending on the file.

Will I lose quality converting .cer to .pem?

OpenAnyFile preserves maximum quality during conversion. Some format-specific features may not transfer between different file types.

Can I convert .pem back to .cer?

Yes, you can convert .pem to .cer using OpenAnyFile as well.

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