Password Entropy Calculator - Online Bits of Security Meter
Calculate the entropy (in bits) of a password based on character pool size and length. Visual strength meter with crack time estimation. Local only.
UD5 Toolkit
Calculate the entropy (in bits) of a password based on character pool size and length. Visual strength meter with crack time estimation. Local only.
Enter a router's MAC address or serial and generate the common default WPA passphrase for major ISP brands. Educational purpose only.
Generate a bcrypt hash from a password with configurable salt rounds. Verify a password against a hash. Entirely client‑side.
Enter a password and see the estimated time it would take to crack using brute force at different speeds. Educational.
Derive a strong cryptographic key from a password using PBKDF2 with SHA‑256. Adjust iterations and salt. Educational and test tool.
Generate Argon2id hashes in the browser using a WASM compilation. Choose memory, iterations, and parallelism. Secure local hashing.
Check if a password appears in the Have I Been Pwned database using k‑Anonymity. Only the first 5 characters of the hash are sent.
Hash passwords using the bcrypt algorithm with configurable cost factor. Also verify a password against a stored hash. All local.
Evaluate password strength through a short interactive story where each character set adds lines to a narrative. Educational fun.
Type a password and see a bar that fills based on estimated bits of entropy. Color‑coded feedback. No storage.
Tell if your password has appeared in data breaches without sending the full password. Uses hash prefix locally.
Create a random long password that alternates consonants and vowels to mimic a pronounceable word. XKCD meets CVCV. Local.
Create secure passwords that look like gibberish words but are easy to pronounce and remember. Mix of syllables. Local generation.
Create a strong, memorable password using 4 random common words. The famous xkcd method. Local wordlist.
Generate encrypted passwords for .htaccess basic authentication. Create .htpasswd entries using bcrypt, MD5, or SHA. Server admin utility, local compute.
Compare your password against a built‑in list of the 10,000 most common passwords. Instant warning if it appears.
Store passwords and notes encrypted with a master passphrase. Data lives only in your browser's localStorage. No cloud.
Generate ultra-secure, random passwords with configurable length and character sets. Created entirely on your device; never transmitted or stored.