Decode PEM headers, public keys, and certificate structures.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Insert your PEM-formatted X.509 certificate, private key, or CSR into the viewer.
View parsed subject, issuer, validity dates, SAN domains, public key algorithm, and fingerprint.
Check expiration countdown, key length compliance, and signature algorithms.
Yes. Utilifie never transmits certificates or private keys over the network; all ASN.1 parsing is local.
Standard X.509 certificates (CRT/CER), CSRs, and RSA/ECDSA public keys in PEM format.
Zero-egress companion tools in the Security & Network suite
Audit CSP, HSTS, X-Frame-Options, and security headers with OWASP grading (A+ to F).
Measure cryptographic randomness, Shannon entropy (0-8 bits/byte), Chi-square test, and byte distributions.
Generate secure RFC 6238 Base32 TOTP secret keys and standard otpauth:// URIs for Google Authenticator.
Construct and validate HTTP CSP headers and meta tags.
