Security & Privacy tools

Generate strong random passwords with crypto.getRandomValues.

Estimate password entropy, weaknesses and offline crack time locally.

Generate memorable multi-word passphrases with a separator and number.

Generate high-entropy API keys in hex, Base64URL or alphanumeric form.

Compute HMAC signatures with SHA-1, SHA-256 or SHA-512 locally.

Encrypt text or files with AES-256-GCM and a passphrase, locally.

Generate RSA-OAEP key pairs and export public/private PEM files.

Hash a file and compare it with a published MD5, SHA-1, SHA-256 or SHA-512 checksum.

Store API keys and passwords encrypted in this browser with a passphrase.

Create Apache htpasswd lines with bcrypt hashing.

Compute SHA-256 and MD5 fingerprints from an SSH public key.

Calculate network, broadcast, mask, host range and usable hosts from an IPv4 CIDR block.

Normalise MAC addresses into colon, hyphen, dot, Cisco and bare formats.

Validate card number syntax with the Luhn algorithm and detect the brand.

Generate time-based one-time codes from a Base32 authenticator secret.

Create custom QR codes for URLs, text and contact details with colour controls.

Decode a QR code from an image or screenshot, locally.

Create Code 128, EAN, UPC, Code 39 and ITF-14 barcodes as PNGs.

Decode common 1D and 2D barcodes from an image locally.

Create a QR code that lets guests join your Wi-Fi network without typing the password.