Password Analyser with Entropy Meter
Analyse password strength with entropy calculation, character-set detection, estimated crack time, and pattern warnings — all computed locally, never transmitted.
The Security Knife for Developers
InfoSec essentials — zero dependencies, zero trust required
Build software without cloud dependencies. The Security Knife gives developers 5 specialised tools in a single HTML file that runs entirely offline.
The Security Knife packages five essential information security utilities into a single HTML file. Analyse password strength with entropy calculations, build CORS headers interactively, decode and inspect JWT tokens, generate Content Security Policy headers, and convert between encoding formats — all running locally in your browser. No data ever leaves your machine.
WHAT'S INSIDE
5 tools in a single HTML file
CORS Header Builder
Build Access-Control headers interactively — select origins, methods, headers, and credentials, then copy the complete header set for your server config.
JWT Decoder & Inspector
Paste a JWT and see the decoded header, payload, and signature. Validates structure, checks expiration, and highlights common security issues.
CSP Generator
Build Content Security Policy headers directive by directive. Preview violations, test against common CDNs, and export as HTTP header or meta tag.
HOW IT WORKS
Three steps. No setup.
1
Download the file
Purchase The Security Knife and download a single HTML file. No installer, no account, no setup.
2
Open in any browser
Double-click to open in Chrome, Firefox, Safari, or Edge. Works on any operating system.
3
Start working
Your data stays in your browser's local storage. Nothing is uploaded. Ever.
COMPLIANCE & GEOGRAPHY
Global
Works in any country. No server dependency, no regional restrictions.
FAQ
Frequently Asked Questions
Why should Developers use The Security Knife?
The Security Knife is built for developers who need code & tech tools without cloud dependencies. Password analyser, CORS header builder, JWT decoder, CSP generator, and encoding converter. Security tools that don't phone home — because that would be ironic.
Does The Security Knife work offline?
Yes. The Security Knife is a single HTML file that runs entirely in your browser. No internet connection required. Your data never leaves your machine.
Is The Security Knife a subscription?
No. The Security Knife is a one-time purchase ($39). No monthly fees, no renewals, no price increases.
What tools are included in The Security Knife?
The Security Knife includes 5 tools: Password Analyser with Entropy Meter, CORS Header Builder, JWT Decoder & Inspector, CSP Generator, Encoding Converter (Base64, Hex, URL, HTML). All accessible from a single HTML file.
Can I try The Security Knife before buying?
Yes. Every product page includes an interactive demo you can try in your browser. No signup required.
No cloud One fileOne-time purchase
Get The Security Knife — $39Sovereignty as a Service