Developer Regex & Cybersecurity Studio
Interactive regular expression matching, token analyzer, and NIST cryptographic password entropy evaluation.
Pattern Library:
/
/
Expression compiles successfully with no syntax errors.
Time: 0.12 ms
Test String Input
Visual Match Canvas
3 matches
Alternating Match Highlights
Match Inspector & Capture Groups Breakdown
Inspect start/end character indices and individual capture groups extracted by parentheses.
| Match | Full Matched String | Index Range | Length | Capture Groups Extracted |
|---|
Cryptographic Password Entropy Analyzer
Calculates exact mathematical information entropy \(E = L \times \log_2(R)\) completely in-browser without sending keys to any remote server.
NIST Security Strength Score:
Calculating...
Lowercase (a-z)
0
Uppercase (A-Z)
0
Digits (0-9)
0
Symbols (!@#$)
0
Vulnerability Checks:
Brute-Force Simulator
Estimated Time to Crack
Assumes brute-force exhaustion across multiple hardware attack scenarios.
Total Information Entropy
0.00 Bits
Character Pool Size (R): 0 possibilities
Online Attack (Throttled)
100 guesses / second
Instant
Web API (Unthrottled)
10,000 guesses / second
Instant
GPU Rig (MD5 / NTLM)
100 Billion guesses / second
Instant
Massive Parallel Cluster
100 Trillion guesses / second
Instant
Cryptographically Secure Generator (CSPRNG)
Powered by the browser's hardware-grade window.crypto.getRandomValues() engine.
Click 'Generate Secure Key' below...
Key Length: 18 Characters