Security Toolkit

Cybersecurity Tools

Free browser-based cybersecurity tools for hashing, JWT decoding, password checks, CSP and CORS debugging, and network utility workflows.

17 ToolsBrowser-BasedPrivacy-First

Showing 17 security tools

Open a tool, test the workflow, and keep sensitive input local whenever the page supports it.

Encoding

JWT Decoder

Fully offline client-side JSON Web Token decoder to parse and verify header, payload, and signature data.

Analysis

Password Strength Analyzer

Analyze passwords for entropy, crack-time estimates, pattern matches, and common leaks.

Cryptography

Password Generator

Secure client-side random password and passphrase generator using cryptographically secure random values.

Network

CIDR Subnet Calculator

Calculate usable IP ranges, broadcast address, netmask, and subnet details from any CIDR input.

Auditing

CSP Header Builder

Visual editor for Content-Security-Policy (CSP) HTTP headers with directive autocomplete.

Network

CORS Header Debugger

Debug preflight requests and configure correct Access-Control-Allow-Origin headers.

Cryptography

Hash Generator & Verifier

Generate and check cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) directly in your browser.

Cryptography

Bcrypt Hash Generator

Generate and compare secure Bcrypt password hashes with customized work factors.

Auditing

SRI Hash Generator

Generate Subresource Integrity (SRI) hashes and script tags for secure CDN assets.

Auditing

Security.txt Generator

Visual form generator for RFC 9116 compliant security.txt vulnerability disclosure files.

Analysis

SSL Certificate Decoder

Parse and check local PEM encoded SSL/TLS certificates for subject names, expiry dates, and trust chains.

Network

IP Address Class Checker

Determine IP classes, ranges, special-use properties (private, loopback, multicast), and details.

Encoding

Encoding Detective

Automatically detect and decode Base64, Hex, URL, and ROT13 text formats safely.

Network

Common Port Reference

Quickly search well-known and registered TCP/UDP network ports and services.

Analysis

CVSS Calculator

Calculate Common Vulnerability Scoring System (CVSS) v3.1 base score metrics.

Cryptography

Caesar & Vigenere Cipher Tool

Learn cryptographic principles by encoding and decoding Caesar and Vigenere ciphers.

Auditing

Permission Policy Builder

Generate visual Permissions-Policy HTTP headers to control browser features (camera, mic, geolocation).

How it works

Cybersecurity Tools guide and FAQ

Cybersecurity Tools on Toolplex is a focused collection of browser-based utilities for users who need fast, practical help without installing software or creating an account. The category groups related calculators, generators, validators, formatters, checkers, and reference tools so that common tasks are easy to find from one place. Each page is designed to open quickly, explain its purpose clearly, and keep the actual tool experience visible instead of hiding it behind a landing page.

The tools in this category are built for repeated use across desktop, tablet, and mobile screens. A user may open a tool beside a code editor, during a study session, while reviewing a document, or from a phone when they only need a quick calculation or validation. For that reason, Toolplex favors compact controls, readable results, responsive grids, and privacy notes that explain how the page handles input. Whenever possible, the work happens locally in the browser.

This category page is also designed as a navigation and discovery surface. The descriptions help users understand which tool matches their task before opening it. As the product improves, each tool will receive stronger validation, better examples, clearer assumptions, FAQ sections, and deeper explanatory content. The goal is to make the category useful both for people who know exactly what they need and for people who are comparing related tools.

Toolplex tools are productivity helpers, not replacements for professional judgment. Developer and security tools should be tested in the target environment. Finance, medical, education, business, and legal tools should be verified against official sources where the result matters. The category structure, explanatory text, and FAQs are meant to make those boundaries clear while still giving users a quick and useful starting point.