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100% Free & Secure

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

ICert.ca 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

Build a PFX/PKCS#12 file from a certificate, its private key and the CA chain, unpack an existing one, and convert certificates and keys between PEM, DER and PKCS#8. The key encryption is yours to pick — AES-256 for modern platforms, 3DES where an older Windows Server or Java keystore is the target. Everything runs locally in your browser, so the private key never leaves the device.

Build a PFX from certificate + key
Unpack a PFX into PEM files
AES-256 or 3DES key encryption
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). Our converter builds and unpacks PFX/PKCS#12 files and converts between PEM, DER and PKCS#8.

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.

Frequently Asked Questions

Common questions about the tools and how they handle your certificate data.

ICert.ca

Free, browser-based SSL certificate tools. Private keys and certificates you paste into the client-side tools never leave your device.

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