Utilities
Tools
Developer utilities and passive configuration analyzers. Client-side tools stay in your browser; server-side checks only inspect publicly accessible configuration data.
Client-side
Runs in your browser. No data sent.
Password generator
Generate cryptographically secure passwords in your browser.
Client-side onlyPopular
Base64 encode / decode
Encode and decode Base64 with Unicode and URL-safe support.
Client-side only
JSON formatter
Format, validate, and inspect JSON without sending it anywhere.
Client-side only
JWT decoder
Decode JWT headers and claims locally in your browser.
Client-side only
Regex tester
Test regular expressions with live matches and groups.
Client-side only
Public configuration checks
Validated domains only. No intrusive scanning.
TLS certificate validation
Inspect public TLS certificate metadata, expiry, SANs, and cipher details.
Public data onlyFeatured
DNS lookup
Query public A, AAAA, MX, TXT, CNAME, NS, SOA, and CAA records.
Public data only
HTTP security headers
Inspect public HTTP response headers and configuration posture.
Public data onlyFeatured