Password & API Key Entropy Analyzer
How to use Password & API Key Entropy Analyzer
- 1Type or paste a password in the 'Target Password' field to calculate its Shannon Entropy.
- 2Review the 'Est. GPU Brute-Force Time' to see how long it would take an attacker array to crack it.
- 3Check the 'Threat Forensics' panel to see if your password contains weak dictionary patterns or repeated characters.
- 4Use the 'Secure Key Generator' to create mathematically random, highly secure passwords or Base64 API keys.
- 5Everything happens entirely offline using the browser's Web Crypto API.
About Password & API Key Entropy Analyzer
Estimate password entropy and theoretical cracking time, and generate random passwords and keys with your browser's secure random generator. Runs locally.
This tool runs in your browser. Anything you enter is processed on your device. See our Privacy Policy.
More Privacy Tools
View all- Browser-Side PII Data ScrubberStrip names, phone numbers, credit cards, SSNs, and API keys from text before pasting into public AI platforms. 100% local processing.
- Image EXIF & Metadata StripperRemove hidden camera details, GPS coordinates, and timestamps from your photos entirely within your browser.
- Local WebAssembly LLM ChatRun private, localized Language Models directly in your browser tab. Includes simulated local document RAG and WebGPU hardware monitoring.
- Disposable Email & Webhook TesterGenerate temporary endpoints to inspect incoming payloads, view raw headers, and verify JSON formats or email security signatures.