⬡ Raven Academy by Dark Raven Labs
Every tool below actually runs in your browser

Engineer Toolkit

Twelve working reference tools for daily IT, networking, and security work. Nothing here is decorative — everything computes live, entirely client-side. Nothing you type is sent anywhere.

Subnet & CIDR Calculator

Enter an IP and CIDR prefix to get network details.

Enter a valid IPv4 address and prefix (0–32).

IP Address Info

Classify an IPv4 address: private, public, loopback, or reserved.

Base64 Encoder / Decoder

Convert text to and from Base64.

URL Encoder / Decoder

Percent-encode or decode a string for safe use in a URL.

Hash Calculator

Compute SHA-1 and SHA-256 digests of text (browser crypto API). MD5 and SHA-1 are shown for legacy reference only — both are considered cryptographically broken for security use; prefer SHA-256 or better.

JSON Formatter & Validator

Pretty-print JSON and see exactly where it breaks if invalid.

Regex Tester

Test a JavaScript-flavored regular expression against sample text.

Timestamp Converter

Convert between Unix time and human-readable dates (UTC).

Number Base Converter

Convert a number between binary, decimal, and hexadecimal live.

Type in any one field.

Password Strength Estimator

Educational entropy estimate only. Nothing is stored, logged, or transmitted — it never leaves this page.

HTTP Status Code Reference

Search common HTTP status codes and their meaning.

Common Ports Reference

Search well-known ports used across IT and security work.