免費的 CSR 解碼器和產生器。解碼現有 CSR 以查看人類可讀的詳細資訊，包括 CN、SAN 和使用者欄位。也可產生商業憑證的憑證簽名請求（便利工具）。
🔒 We do not store any generated certificates, private keys, or uploaded files. All processing happens in memory and is immediately discarded. Learn more in our Privacy Policy
Decode existing CSRs to view human-readable details including CN, SANs, and subject fields. Also generate CSRs for commercial certificates (convenience tool).
Use this tool to inspect existing CSR files or generate CSRs for certificate authorities.
A Certificate Signing Request (CSR) is a block of encoded text that contains information about your organization and domain. When you want to obtain an SSL/TLS certificate from a Certificate Authority (CA), you first generate a CSR along with a private key. The CSR is then submitted to the CA, which uses it to create your certificate. The private key must be kept secure and is used with the certificate to establish secure connections.
CSRs are essential for obtaining commercial SSL/TLS certificates from trusted Certificate Authorities:
Our free CSR generator makes it easy to create Certificate Signing Requests:
Our CSR decoder allows you to inspect existing Certificate Signing Requests:
At minimum, a CSR requires either a Common Name (CN) or at least one Subject Alternative Name (SAN). Additional fields like Organization, Country, State, and Locality are optional but recommended for organization-validated certificates.
Most Certificate Authorities recommend 2048-bit keys as a minimum. For enhanced security, 3072 or 4096-bit keys are available. Note that larger key sizes may have compatibility considerations with older systems.
Yes, CSRs contain public information and can be decoded without the private key. The private key is only needed when installing the certificate issued by the CA.
Your private key is generated locally and never sent to our servers. It's your responsibility to keep it secure. The private key is required when installing the certificate issued by the Certificate Authority.
OneClickTLS is an online tool that helps developers instantly generate self-signed TLS and mTLS certificates. Instead of searching for complicated OpenSSL commands or creating long scripts, you can generate certificates in seconds by entering your Common Name and SANs. Whether you're looking for TLS generation online or need to generate TLS certificates quickly, this tool provides a fast and secure solution. The tool uses a powerful Go backend with advanced certificate generation capabilities. All processing happens securely on the server, and produces ready-to-use certificate and key files for development and testing environments.
Self-signed certificates are commonly used for development, debugging, local HTTPS setups, staging environments, internal services, and API testing. They help simulate secure communication without requiring a trusted certificate authority. A properly created certificate prevents browser warnings and avoids repetitive manual OpenSSL commands.
Traditionally, developers need to run commands like:
openssl req -new -newkey rsa:2048 -nodes -keyout key.pem -out cert.pem \
-subj "/CN=example.com" \
-addext "subjectAltName=DNS:example.com,DNS:www.example.com"These commands are powerful, but they are also difficult to remember. OneClickTLS eliminates this problem by creating TLS certificates automatically based on simple form inputs.
When it comes to mTLS (mutual TLS), the complexity increases significantly. Setting up mTLS requires generating a Certificate Authority (CA), server certificates, client certificates, and managing certificate chains - a process that can involve multiple OpenSSL commands and configuration files. OneClickTLS simplifies this entire workflow, generating a complete mTLS certificate suite with just a few clicks, saving developers significant time and reducing the chance of configuration errors.
Developers choose this tool when they need to test secure connections quickly, including:
Self-signed certificates are not trusted by browsers or clients in production environments. They are only intended for testing, development, or internal systems where trust can be manually configured.
Subject Alternative Names allow a certificate to support multiple domains or IPs. Modern browsers and TLS clients often ignore the Common Name and rely on SAN values for verification.
Yes, OneClickTLS is safe to use. As detailed in our Privacy Policy, we do not store any generated certificates, private keys, or uploaded files. All processing happens in server memory and is immediately discarded after the response is sent. Your data is never logged, tracked, or shared with third parties. All communication is encrypted via HTTPS to protect your data in transit.
TLS (Transport Layer Security) is the modern successor to SSL (Secure Sockets Layer). While the terms are often used interchangeably, TLS is the current standard for secure communications. Our tool generates TLS certificates that are compatible with all modern systems.
Yes! OneClickTLS certificates work perfectly with Kubernetes Ingress controllers, service meshes, and other Kubernetes components that require TLS certificates. Simply generate your certificate and configure it in your Kubernetes secrets.
After generating your certificate, you can install it in your web server (Nginx, Apache, etc.) or application. For local development, you may also need to add the certificate to your system's trust store to avoid browser warnings.
OneClickTLS helps with the following search terms and use cases:
OneClickTLS makes it simple to generate self-signed TLS or mTLS certificates without dealing with long command line instructions. It is fast, private, browser based, and built for developers who need self-signed certificates for development and testing environments. Self-signed certificates are perfect for local development, internal services, and testing scenarios where a trusted certificate authority is not required. This page helps search engines understand the purpose and value of the tool, allowing it to rank naturally without frequent updates.