DER to PEM Converter

Convert DER (.der) to PEM (.pem) via a free public conversion API from the browser. UniConvert is come-convert-leave: no account and no permanent file library.

Open the interactive DER to PEM Converter (loads automatically when JavaScript is available).

How to convert DER to PEM

Step 1. Choose a .der file from your device.
Step 2. Confirm the output format is .pem — this page is already set to DER → PEM.
Step 3. Start the conversion, then preview, copy, or download the .pem result. Nothing is kept for later.

Why convert DER to PEM here

DER → PEM uses a free public API called directly from the page — no UniConvert servers in the middle.
Category: Certificates & Keys — Certificate and key utilities for PEM, DER, and related encodings.
No signup, no subscription, and no permanent storage of your files on UniConvert.
Status: available now.

DER to PEM FAQ

Is this DER to PEM converter free?

Yes. UniConvert does not require an account for DER → PEM. Ads may appear to keep the site free.

Do you store my DER files?

Files for this pair are sent to the free conversion provider for processing and are not stored by UniConvert afterward.

What is the difference between .der and .pem?

.der is treated as the input format and .pem as the output. Use this page when you specifically need DER → PEM rather than a generic upload form.

Can I convert other formats in Certificates?

Yes — open the Certificates & Keys category for other pairs, or use Convert a file to pick any available source and target.