Extract text from CRT files
To convert your CRT file to another format, you need OpenSSL or other System software.
To convert other file formats to the "Digital Security Certificate" file type, you need software like OpenSSL or a similar tool.
A .CRT file is a standard X.509 Digital Certificate used to verify the identity of websites, servers, or software clients during secure SSL/TLS handshakes. These files contain the public key and identity details (such as the domain name and organization) signed by a Certificate Authority (CA). While crucial for internet security, .CRT files often create friction for system administrators because different server environments require specific encoding standards. For example, a file generated for an Apache HTTP Server is typically Base64-encoded (PEM), whereas Microsoft IIS or Java environments may demand binary formats (DER) or bundled containers like PKCS#12.
Opening these files in a text editor often reveals unreadable blocks of code or binary data, and utilizing command-line tools like OpenSSL to switch formats requires memorizing complex syntax. Furthermore, a standalone .CRT cannot be imported into many systems without its corresponding private key or intermediate chain files. For Linux-based web servers, convert to PEM. For Windows environments or Java keystores, convert to DER or PFX. For archiving complete certificate chains, use P7B.
Convert.Guru analyzes your CRT file, detects the exact format, and lets you read the text inside.
Users also converted KEY, CER, CA-BUNDLE, PEM, CERT, PDF, CTR, P7B, CDR, CR2, ZIP, CSR and SRT files.
If you want to convert CRT file to PEM, PFX, CER, JKS, P12, DER, HTML, HTM, CSS, JS, PHP or ASP, you can use OpenSSL or similar software from the "SSL/TLS Identity Verification" 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 CRT, try OpenSSL or another comparable tool in the "SSL/TLS Identity Verification" 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 CRT converter.