How do I convert DER (.der / .crt / .cer) to PEM?

Upload your DER (.der / .crt / .cer) file on this page, click Convert, and download your PEM file instantly. No sign-up required.

Is converting DER (.der / .crt / .cer) to PEM free?

Yes. Every visitor gets 2 free conversions with no account required. Additional conversions are available via credit packs starting at $2.

Is OmniConvert safe to use?

Yes. Uploaded files are processed in server memory and deleted immediately after conversion. We do not store, log, or share your files.

Does OmniConvert store my files?

No. Files are never written to disk and are discarded as soon as the conversion is complete.

Do I need to install software to convert files?

No. OmniConvert runs entirely in the browser and on our servers. You do not need to install any software, plugins, or extensions to convert DER (.der / .crt / .cer) to PEM.

OmniConvert

DER → PEM

Related Security conversions

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SSH public key → JSON— Parse an SSH public key and extract its type, fingerprint, and key info as JSON
CSR → JSON— Decode a PEM certificate signing request (CSR) and extract subject and metadata as JSON

About this conversion

Convert a binary DER certificate to base64-encoded PEM format. This converter processes your DER (.der / .crt / .cer) file server-side and returns a PEM file instantly — no account, no software installation, and no file storage. Files are deleted from our servers immediately after conversion.

How to convert DER (.der / .crt / .cer) to PEM

1. Upload — drag your DER (.der / .crt / .cer) file onto the converter above, or click to browse.
2. Convert — press Convert. Processing happens on secure servers in seconds.
3. Download — your PEM file downloads automatically. No sign-up required.

Frequently Asked Questions

How do I convert DER (.der / .crt / .cer) to PEM?: Upload your DER (.der / .crt / .cer) file above, click Convert, and download the PEM result instantly. No account or software needed.
Is converting DER (.der / .crt / .cer) to PEM free?: Everyone gets 2 free conversions with no account required. Additional conversions are available via credit packs starting at $2 — credits never expire.
Are my files stored or shared?: No. Files are processed in server memory and deleted immediately after conversion. Nothing is written to disk or retained.
Do I need to install anything?: No software installation needed. OmniConvert runs in the browser — just upload, convert, and download.

No account needed · Credits never expire · Share your token link across devices