Security tools
Quick helpers for hashes, JWTs, certificates, encoders, and defensive security review work.
URL Defang / Refang Tool
Make indicators safer to share, or turn defanged text back when needed.
SSL Certificate Decoder
Paste a PEM certificate and read the subject, issuer, dates, and SANs.
CIDR Calculator
Work out subnet ranges, masks, and host counts without manual math.
URL Encoder and Decoder
Encode query strings safely or decode messy URLs back into readable text.
Hash Generator
Create file or text hashes when you need a quick checksum.
IOC Extractor
Pull URLs, domains, IPs, and hashes out of noisy security text.
CSR Decoder
Check a CSR before issuance so the CN, SANs, and key details are right.
Base64 Encoder and Decoder
Encode or decode Base64 text and inspect the result right away.
JWT Decoder
Open a JWT and inspect the header, payload, and timestamp claims.