How It Works Under the Hood
Utilizes the native browser window.crypto.getRandomValues() and crypto.subtle.digest() APIs. Cryptographic operations run in isolated hardware memory with zero network packets emitted.
Step-by-Step Instructions
Select Password Generator or WebCrypto Hash Generator tab.
For passwords: adjust length, character rules, or switch to Diceware passphrase mode.
For hashes: type or paste plaintext, or upload a local file to compute checksums instantly.
Use the Checksum Matcher to verify whether a hash matches an expected value.
Key Features & Performance
- Hardware WebCrypto Security: Cryptographically secure pseudo-random number generator (CSPRNG)
- Multi-Algorithm Hashing: SHA-256, SHA-512, SHA-384, SHA-1, and MD5
- Entropy & Crack-Time Simulation: Shannon entropy scoring based on character pools
- Zero Server Logs: Complete offline safety for credentials and sensitive checksums
Local Browser Processing & Privacy
Traditional web converters upload your documents, snippets, or media files to remote servers. Secure Offline Password & Hash Generator runs inside your browser tab:
Your input text and files are processed locally without uploading payloads to a processing server.
Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).
Working outputs stay in your browser tab and are released when you reset the tool or close the tab.
Frequently Asked Questions
Is it safe to generate passwords on a website?
Most online generators send requests to their backend, where passwords can be logged. Microdeck generates passwords exclusively in your browser RAM using window.crypto. You can even disconnect your Wi-Fi and it will still work!
What makes a passphrase stronger than a short password?
Long multi-word passphrases drawn from large wordlists (e.g., 6+ random words from a 7,776-word Diceware list yielding ~77+ bits of entropy) resist brute-force guessing well while staying memorable. Note that the built-in demo wordlist here uses 40 words (~5.3 bits per word), so for high-security accounts prefer Random Password mode with 16+ characters.
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