DER File — Open & Convert .der Online
What Is a .der File?
DER (.der) is a security file format. DER encoded certificate Created by ITU-T, this format is essential for security analysts.
How to Open .der Files
Upload your .der file to OpenAnyFile and instantly inspect and validate it in your browser. No software installation required. Works on Windows, macOS, Linux, iPhone, and Android.
Everything About DER Files
Popular DER Conversions
Frequently Asked Questions
What is a .der file?
A .der file is a security format called DER. DER encoded certificate
How do I open a .der file without installing software?
Upload your .der file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .der files?
.der files are typically created by ITU-T.
Can I convert .der to another format?
Yes. OpenAnyFile converts .der to PEM, CRT.
Is it safe to open .der files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .der on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.