무료 mTLS(상호 TLS) 인증서 생성기. 개발 및 테스트를 위한 CA, 서버 및 클라이언트 인증서를 포함한 완전한 mTLS 인증서 세트를 생성합니다.
🔒 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
Create a complete self-signed mTLS certificate suite including CA certificate, server certificate, client certificate, and all associated keys.
mTLS (mutual TLS) enables two-way authentication where both the server and client present certificates for verification.
mTLS (mutual TLS) is an extension of TLS that requires both the client and server to authenticate each other using certificates. Unlike standard TLS where only the server presents a certificate, mTLS enables two-way authentication, making it ideal for secure API communication, microservices, and zero-trust network architectures.
mTLS provides enhanced security for applications that require client authentication:
Our mTLS certificate generator creates a complete certificate suite with a single click:
Simply enter your Subject Alternative Names (SANs) above, configure optional certificate fields, and click "Generate mTLS Certificates". The tool will create all necessary files for a complete mTLS setup.
The key difference between mTLS and standard TLS:
Standard TLS:
Server presents certificate → Client verifies server → Connection established
mTLS (Mutual TLS):
Server presents certificate → Client verifies server → Client presents certificate → Server verifies client → Connection established
This two-way authentication makes mTLS perfect for scenarios where you need to verify the identity of clients connecting to your services.
TLS (Transport Layer Security) provides one-way authentication where only the server presents a certificate. mTLS (mutual TLS) extends this to require both server and client certificates, enabling two-way authentication for enhanced security.
Use mTLS when you need to verify client identity, such as API gateways, microservices communication, IoT device authentication, or any scenario where you need to ensure only authorized clients can access your services.
After generating your mTLS certificates, configure your server to require client certificates. This typically involves setting up your web server (Nginx, Apache, Caddy) or application server to request and verify client certificates during the TLS handshake.
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.