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    My-SSL LogoMy-SSL
    100% Free & Client-Side

    Free Online SSL Tools

    Generate CSR online, check SSL certificate validity, decode certificates, convert formats, and more. All processing happens securely in your browser.

    Secure
    Instant
    No Data Stored

    SSL Certificate Checker

    Analyze SSL certificate status, chain hierarchy, and security configuration

    Secure Analysis
    Real-time Data
    Chain Verification

    Ready to Analyze

    Enter a domain name above to check its SSL certificate status

    Certificate StatusExpiration CheckChain Analysis

    About Our Free SSL Certificate Tools

    My SSL provides a comprehensive suite of free online SSL tools designed for web developers, system administrators, and IT professionals. Whether you need to generate a CSR for a new SSL certificate, check your website's SSL status, convert certificate formats, or verify key pairs, our browser-based tools handle it all securely and instantly. Every tool operates entirely client-side, meaning your sensitive cryptographic data never leaves your device.

    Complete Toolkit

    SSL Tool Guide

    Choose the right tool for your SSL management needs

    CSR Generator

    SSL Tool

    Generate a Certificate Signing Request (CSR) and private key pair instantly. Our free CSR generator creates cryptographically secure RSA keys in 2048, 3072, or 4096-bit lengths. Simply enter your domain and organization details to create a CSR ready for SSL certificate enrollment with any certificate authority.

    RSA 2048, 3072, 4096-bit key support
    Instant private key generation
    Copy or download CSR and key files
    Works with all certificate authorities

    Web developers, system administrators, and IT teams requesting new SSL certificates.

    CSR Decoder

    SSL Tool

    Decode and analyze any Certificate Signing Request to verify its contents before submission. Our CSR decoder extracts and displays the Common Name, Organization, Country, State, Locality, key size, and signature algorithm. Essential for validating CSR accuracy before purchasing an SSL certificate.

    Extract all CSR fields instantly
    Verify domain and organization info
    Check key size and algorithm
    Validate CSR format and structure

    SSL administrators verifying CSR contents before certificate enrollment.

    SSL Checker

    SSL Tool

    Check any website's SSL certificate status, expiration date, and security configuration. Our SSL checker performs a comprehensive analysis including certificate chain validation, issuer verification, protocol support, and common security vulnerabilities. Get instant insights into your SSL health.

    Certificate expiration monitoring
    Full chain validation
    Issuer and CA verification
    Security vulnerability detection

    Website owners, DevOps teams, and security professionals monitoring SSL health.

    Certificate Converter

    SSL Tool

    Convert SSL certificates between all major formats including PEM, DER, PFX/PKCS#12, and PKCS#7. Our certificate converter handles format transformations required for different web servers like Apache, Nginx, IIS, and Tomcat. All conversions happen locally in your browser for maximum security.

    PEM to PFX/PKCS#12 conversion
    DER to PEM transformation
    PKCS#7 format support
    Server-specific formatting

    Server administrators deploying certificates across different platforms.

    Key Matcher

    SSL Tool

    Verify that your private key matches your SSL certificate before installation. Our key matcher compares the cryptographic modulus of both files to confirm they form a valid key pair. This essential pre-installation check prevents SSL configuration errors and failed HTTPS connections.

    Instant key pair validation
    Modulus comparison algorithm
    Prevents installation errors
    Supports RSA key pairs

    System administrators installing SSL certificates on production servers.

    Certificate Decryptor

    SSL Tool

    Decrypt password-protected private keys for server installation. Our certificate decryptor removes the passphrase encryption from PEM-encoded private keys, producing an unencrypted key suitable for web server configuration. All decryption happens client-side—your passphrase is never transmitted.

    100% client-side decryption
    PEM format support
    Passphrase never transmitted
    Instant key decryption

    Developers and admins preparing private keys for automated server deployments.

    Certificate Decoder

    SSL Tool

    Decode and view all details of your PEM-encoded SSL certificate. Our Certificate Decoder extracts issuer information, validity period, subject details, serial number, signature algorithm, public key specifications, Subject Alternative Names (SANs), fingerprints (SHA-1, SHA-256), and certificate extensions. Essential for verifying certificate contents before server installation.

    View issuer and subject details
    Check validity period and expiration
    Extract SAN entries and extensions
    Verify signature and key algorithms

    Server administrators verifying SSL certificate contents before deployment.

    Why Choose Our SSL Tools

    Built with security and usability as top priorities, our tools offer advantages over desktop software and other online alternatives.

    100% Client-Side Processing

    Your private keys and certificate data never leave your browser. All cryptographic operations happen locally using the Web Crypto API, ensuring complete privacy and security.

    No Registration Required

    Access all SSL tools instantly without creating an account. No email verification, no sign-ups, no barriers—just immediate access to the tools you need.

    Cross-Platform Compatible

    Works on any modern browser across Windows, macOS, Linux, and mobile devices. No software installation required—everything runs in your web browser.

    Industry-Standard Security

    Generate RSA keys up to 4096 bits with SHA-256 signatures. Our tools follow the same cryptographic standards used by certificate authorities worldwide.

    How SSL Certificate Tools Work

    Understanding the basics helps you use these tools more effectively.

    What is a CSR and Why Generate One?

    A Certificate Signing Request (CSR) is an encoded file containing your public key and organization information. When you apply for an SSL certificate, the certificate authority uses your CSR to create a certificate bound to your private key. Our CSR Generator creates both the CSR and a matching private key that you must keep secure and use during certificate installation on your web server.

    Understanding Certificate Formats

    SSL certificates come in various formats for different server platforms. PEM is the most common format (Base64-encoded, used by Apache and Nginx). DER is binary-encoded (used by Java platforms). PFX/PKCS#12 bundles certificate and private key together (used by Windows IIS). PKCS#7 contains only certificates without private keys. Our converter handles transformations between all these formats.

    Certificate Chain Verification

    SSL certificates form a chain of trust from your website's certificate through intermediate certificates up to a root certificate authority. Our SSL Checker validates this entire chain, ensuring proper installation. A broken chain causes browser security warnings even with a valid certificate. The tool also checks expiration dates, protocol support, and common misconfigurations.

    Private Key Security Best Practices

    Your private key is the most sensitive component of SSL security. Never share it, email it, or store it in unsecured locations. When using our tools, all key operations happen in your browser—we never see or store your private keys. If a private key is compromised, immediately revoke the associated certificate and generate a new key pair.

    Who Uses These SSL Tools

    Trusted by professionals across industries for secure, reliable SSL certificate management.

    Web Developers

    Streamline SSL certificate management during development and deployment workflows.

    System Administrators

    Quickly generate, verify, and convert certificates for server configurations.

    IT Security Teams

    Monitor SSL health and validate certificates across enterprise infrastructure.

    Small Business Owners

    Manage website security without technical expertise or expensive tools.

    Need an SSL Certificate?

    Browse our selection of trusted SSL certificates starting at just $3.99. Domain validation, organization validation, and extended validation options available.

    View SSL CertificatesCompare Pricing

    Learn More About SSL

    Guides and tutorials to help you understand SSL certificates

    What is SSL?CSR Generation GuideSSL Tools GuideBuy SSL Certificates

    Frequently Asked Questions

    Answers to common questions about certificates and our services.

    What is a CSR and why do I need to generate one?

    A Certificate Signing Request (CSR) is a block of encrypted text that contains your organization's information. It's required when applying for an SSL certificate. Our free CSR Generator creates both the CSR and a private key that you'll need to install your certificate.

    Is it safe to use online SSL tools?

    Yes, our SSL tools are 100% safe. All processing happens client-side in your browser - your private keys and sensitive data never leave your device. We don't store, log, or transmit any of your certificate data to our servers.

    How do I check if my SSL certificate is valid?

    Use our SSL Checker tool by entering your domain name. It will analyze your certificate's validity, expiration date, certificate chain, issuer information, and detect any security issues like protocol vulnerabilities or configuration problems.

    What certificate formats can I convert between?

    Our Certificate Converter supports all major formats including PEM, DER, PFX/PKCS#12, and PKCS#7. You can convert certificates for use on different server platforms like Apache, Nginx, IIS, Tomcat, and more.

    How do I verify my private key matches my certificate?

    Use our Key Matcher tool to paste both your private key and certificate. The tool will compare the modulus of both to confirm they form a valid key pair. This is essential before installing your SSL certificate.

    What does the CSR Decoder show me?

    The CSR Decoder extracts and displays all information contained in your CSR including: Common Name (domain), Organization, Country, State, Locality, Email, Key Size, and Signature Algorithm. This helps verify your CSR is correct before submission.

    How do I decrypt a password-protected private key?

    Use our Certificate Decryptor tool. Paste your encrypted private key and enter the passphrase. The tool will decrypt it locally in your browser, giving you an unencrypted key for server installation. Your passphrase is never transmitted.

    What does the Certificate Decoder show me?

    The Certificate Decoder extracts all information from your PEM-encoded SSL certificate including: Subject (domain, organization), Issuer (CA details), Validity period (Not Before/After dates with days remaining), Serial Number, Signature Algorithm, Public Key details, Subject Alternative Names (SANs), fingerprints (SHA-1, SHA-256), and certificate extensions like Key Usage. This helps verify certificate details before installation.

    What are CAA records and why should I check them?

    CAA (Certification Authority Authorization) records are DNS records that specify which Certificate Authorities are authorized to issue SSL certificates for your domain. Checking CAA records helps you understand your domain's certificate issuance policy, verify security configurations, and troubleshoot certificate issuance problems.

    Are these SSL tools really free?

    Yes, all our SSL tools are completely free with no registration required. We provide these tools to help web administrators and developers manage their SSL certificates more easily. There are no hidden fees or usage limits.

    Still Have Questions?

    Contact our support team with questions about certificates, installation, or technical issues.