SSL / Cert
Certificate generation, analysis, conversion, and validation tools — all running in your browser.
CSR Generator
Generate Certificate Signing Requests with RSA/ECDSA keys. Supports 2048/4096-bit keys with full DN fields.
CSR Analyzer
Parse and analyze Certificate Signing Requests. Extract subject, key info, signature algorithm, and verify CSR signature.
Certificate Analyzer
Analyze SSL/TLS certificates. Shows subject, issuer, validity, key size, signature algorithm, self-signed detection, and SHA-256 fingerprint.
PEM Merger
Merge certificate, intermediate CA chain, and private key into a single PEM file. Includes key-cert match validation.
P7B Merger
Create PKCS#7 (P7B) certificate chain from certificate and intermediate CA chain files.
PFX Merger
Generate PKCS#12 (PFX) certificate files from certificate and private key with AES-256 encryption. Validates key-cert match first.
Punycode Converter
Convert Unicode domain names to Punycode (xn--) and back. Supports IDN internationalized domain names.
Certificate Chain Checker
Parse and display full certificate chain info. Shows subject, issuer, validity, days-until-expiry, and self-signed detection per cert.
Key-Certificate Validator
Validate that a private key matches its certificate by comparing public key SHA-256 hashes. Shows key and cert info side by side.