Utility 4 Image Steganography Hide a secret message in the least-significant bits of an image, then read it back, entirely in your browser. Nothing is uploaded.
Demo Passphrase Entropy Visualiser How strong is your password, really? A live, honest strength visualiser that shows the maths a cracker actually uses, and never sends a keystroke anywhere.
Demo Mine a Bitcoin Block Proof-of-work, by hand. Turn up the difficulty, spin the nonce, and watch real double-SHA-256 hunt for a hash below the target, the actual mechanism behind Bitcoin.
Utility TLS Certificate Inspector Paste a PEM certificate and read what it actually claims, subject, SANs, issuer, validity, key type and signature. Parsed in your browser; nothing is uploaded.
Demo Text Embeddings, In Your Browser See how an AI model understands meaning. Compare texts by semantic similarity and run semantic search, using a real ML model that runs entirely in your browser, with nothing sent to any server.
Utility CIDR / Subnet Visualiser Enter an IPv4 CIDR block and see it laid bare, network and broadcast, usable host range, mask, host count, the binary, and a splittable map of the address space. All computed in your browser.
Utility Hash & Encoding Playground Paste anything and watch its hashes and encodings update live, SHA-256/384/512, SHA-1, base64, hex, URL-encoding. Computed in your browser; nothing is ever sent anywhere.