CER to DER.
Without the cloud.
Convert CER files to DER right here in your browser. Fast, free and private: nothing is uploaded.
- 0 bytes uploaded
- 299+ formats
- 0 accounts
Drop files hereor click to choose · paste works too
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How to convert CER to DER
- Drop your CER file into the red box above, or click it to choose a file.
- DER is already selected. Click Convert — you can add many files at once.
- Download your DER file. It was created on your device; nothing was uploaded.
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Questions
Is it safe to convert CER to DER here?
Yes. The conversion runs locally in your browser, so your CER file is never sent to a server.
Do I need to install anything to convert CER to DER?
No. It works in any modern browser on Windows, macOS, Linux, Android and iOS.
Can I convert several CER files at once?
Yes. Drop as many files as you like; they are converted one after another and you can download them all at once.
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