Convert Certificate Format

Using this tool, you may convert digital certificates to and from different formats including PEM, DER, and PKCS#7/P7B.

Select your Original Certificate
Format of Original Certificate
Choose the Target Format
Notes on Certifcate Formats

PEM Format
PEM files are Base64 encoded ASCII and contain "-----BEGIN CERTIFICATE-----" and "-----END CERTIFICATE-----" statements. Both digital certificates and private keys can be in PEM format. PEM files usually end with .pem, .crt, .cer, or .key. Multiple PEM certificates and private keys, may be included in one file, one below the other. However, many platforms, such as Apache, require the certificates and private key to be in separate files.

DER Format
DER files are in binary format. They usually end with .der or .cer, so to differentiate between DER.cer and PEM.cer files, you may need to use a text editor to look at the BEGIN/END statements. Both digital certificates and private keys can be encoded in DER format. DER is typically used with Java platforms. The QuoVadis tool can only convert certificates to DER format. You should use OpenSSL if you need to convert a private key to DER.

PKCS#7/P7B Format
The PKCS#7 or P7B format is usually stored in Base64 ASCII format using the .p7b or .p7c file extensions. P7B certificates contain "-----BEGIN PKCS7-----" and "-----END PKCS7-----" statements. P7B files only contain certificates, not the private key. Several platforms support P7B files including Microsoft Windows and Java Tomcat.

Important Note:

PKI Widgets is a service based in the United States and Bermuda. This page is located in Bermuda. PKI Widgets does not require the input of any personal data and we recommend that you do not provide any when using these tools. QuoVadis confirms that any data you enter will not be retained on our databases beyond the operational requirements of the tool used. QuoVadis does not guarantee the availability or accuracy of these tools.