Extract text from Certificate revocation lists (CRL)
To convert CRL Revocation lists to another format, you need OpenSSL or other Encoded software.
To convert other file formats to the "X.509 PKI Certificate" file type, you need software like OpenSSL or a similar tool.
.CRL is a Certificate Revocation List file used in X.509 Public Key Infrastructure. It contains a list of digital certificates that have been revoked by a Certificate Authority (CA) before their scheduled expiration date. System administrators and security software, such as OpenSSL or standard web browsers, use these files to block compromised or invalidated certificates. For more technical background, see the Wikipedia article on Certificate Revocation Lists.
The main disadvantage of the .CRL format is its encoding. These files are typically distributed in the binary DER format. This means you cannot open them in a standard text editor. System administrators frequently need to read the revoked certificate serial numbers and revocation dates to debug SSL/TLS connection failures, which is impossible without specialized command-line tools.
Converting a .CRL file to PEM (Base64 encoded text) or TXT (plain text output) is the best standard workaround. Converting to plain text allows you to easily search for specific serial numbers using standard tools. Note that converting to plain text strips the cryptographic signature, making it suitable for human reading but not for importing back into a server as a trusted list.
This file format is difficult to open or convert because standard document converters do not understand ASN.1 data structures or cryptographic encodings. Usually, only the original cryptographic software can properly read or export the data. If our analysis detects a supported underlying or embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your CRL file, detects the exact format, and lets you read the text inside.
Users also converted CDR, CRT, CLR, PEM, CER, ODT, CMS, SVG, HTML, IPS, AAE, EXE and PDF files.
If you want to convert CRL file to PEM, PDF, CER, TXT, TEXT, HTML, HTM, CSS, JS, PHP, ASP or ASPX, you can use OpenSSL or similar software from the "Certificate Revocation Status" category. In the File menu, look for Save As… or Export….
To convert RSS, CSS, CGI, SITEMAP, PL, WEBMANIFEST, JSON, JS, XML, HTML, ICO or HTM files to CRL, try OpenSSL or another comparable tool in the "Certificate Revocation Status" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CRL converter.